Search Results: "conjugate acid- pairs | acids bases | chemistry | khan academy"

All Most Recent Most Viewed

01:45 Popular
Counting Dogs, Mice, And Cookies | Counting | Early Math | Khan Academy

753 views / 0 likes - added 8 years ago

Learn how to count animals organized in different patterns. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-count-object-topic/e/how-many-objects-2?utm_sour
04:44 Popular
Relative clauses | Syntax | Khan Academy

753 views / 0 likes - added 6 years ago

A relative pronoun is a word like “that” or “which” or “who”, so a relative clause is a clause that begins with a relative pronoun. In the sentence “The dragon who breathed blue fire has retired,” “who breathed blue fire” is a relative clause. Learn more
01:03 Popular
Counting Whales, Sheep, And Flowers | Counting | Early Math | Khan Academy

752 views / 0 likes - added 8 years ago

Learn how to count animals. Animals in these pictures are organized neatly. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-count-object-topic/e/how-many-ob
04:40 Popular
Measuring Lengths 2 | Measurement And Data | Early Math | Khan Academy

752 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-math-measuring-length/e/measuring-lengths-2?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch the ne
07:30 Popular
What Was The Miller-Urey Experiment?

751 views / 0 likes - added 5 years ago

Click this link to take a survey about this video: https://www.surveymonkey.com/r/X2D8D7R This animation was sponsored by the Center for Chemical Evolution, NSF, and NASA: http://centerforchemicalevolution.com/ Help support Stated Clearly on Patreon: http
01:47 Popular
Dinosaur ROMANCE

749 views / 0 likes - added 9 years ago

Dinosaurs expressed love, too. See how the mating process brought pairs together. Watch the whole playlist of dinosaur videos here: http://www.youtube.com/watch?v=sW4p6vzviKQ&list=PLfpPYJH6OjtZGZH1hlR40wD4rnq14p41x&index=1 Subscribe For More Dinosaur Vide
03:27 Popular
Key Features Of Graphs — Harder Example | Math | New SAT | Khan Academy

749 views / 0 likes - added 8 years ago

Watch Sal work through a harder Key features of graphs problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q6-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT
09:29 Popular
Equilibrium Equations: Crash Course Chemistry #29

748 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
07:40 Popular
Comparing Numbers Represented In Different Ways | 4th Grade | Khan Academy

748 views / 0 likes - added 8 years ago

Examples of Khan Academy practice problems where you compare decimals, fractions, and number diagrams. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-compare-decimal
03:33 Popular
Losing Tennis Balls | Addition And Subtraction Within 100 | Early Math | Khan Academy

744 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-100-word-problems/e/addition-and-subtraction-word-problems-within-100--level-1?utm_source=YT&utm_medium
04:39 Popular
High Speed Chemistry - Periodic Table Of Videos

743 views / 0 likes - added 9 years ago

Filming chemistry with a high-speed camera - main videos coming soon, but here's a preview and chance to see someone stroke The Prof's hair! Reactions filmed with a Phantom Miro (awesome!). We used this: http://www.visionresearch.com/Products/High-Speed-C
05:38 Popular
Prepositional Phrases | Prepositions | The Parts Of Speech | Grammar

742 views / 0 likes - added 8 years ago

Prepositional phrases are word chunks that begin with a preposition. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-preposition/e/prepositional-phrases/ Missed the previous lesson? https://www.khanacademy.org/the-preposi
03:38 Popular
Sea Monsters And Superheroes | Addition And Subtraction Within 20 | Early Math | Khan Academy

741 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-word-problems-within-20/e/addition-and-subtraction-word-problems-within-20--level-1?utm_source=YT&utm_medium=Des
01:36 Popular
How To Make a Flying Balloon Without Helium - Cool Science Experiments

739 views / 1 likes - added 6 years ago

Please be careful, 'cause the hydrogen gas obtained by mixing aluminum foil with an acid from Mr Muscolo is highly flammable. For people who don't know, Mr Muscolo is a drain cleaner. If you don't have Mr Muscolo, you can use a Hydrochloric Acid Click bel
04:31 Popular
Counting American Coins | Measurement And Data | Early Math | Khan Academy

738 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-math-money/v/counting-dollars?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch the next lesson: htt
03:38 Popular
The Nobel Prize in Chemistry: Molecular Machines, Explained

737 views / 0 likes - added 7 years ago

The 2016 Nobel Prize in Chemistry goes to Jean-Pierre Sauvage, Sir Fraser Stoddart, and Ben Feringa. Read all about it: http://cen.acs.org/articles/94/web/2016/10/Molecular-machines-garner-2016-Nobel-Prize-in-Chemistry.html ↓↓More links and references bel
11:57 Popular
Calorimetry: Crash Course Chemistry #19

736 views / 0 likes - added 9 years ago

Today's episode dives into the HOW of enthalpy. How we calculate it, and how we determine it experimentally...even if our determinations here at Crash Course Chemistry are somewhat shoddy. -- Table of Contents Hess' Law 2:30 Calorimeter 3:12 Calorimetry 3
02:50 Popular
Adding By Getting To Group Of 10 First | Early Math | Khan Academy

736 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-making-groups-of-ten/e/making-100?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch the next lesson: h
11:22 Popular
Lactic Acid Fermentation

735 views / 0 likes - added 8 years ago

Lactic acid fermentation. How organisms like lactobacillus convert pyruvic acid to lactic acid and oxidize NADH to NAD+ in the process.
05:54 Popular
The Deal With Fat

735 views / 0 likes - added 8 years ago

Dietary science is complicated-- one day something is good for you and the next it's not. Learn what we DO know about fat chemistry in this episode of SciShow. Snatoms Kickstarter IS still going on: https://www.kickstarter.com/projects/veritasium/snatoms-
07:19 Popular
Brew Perfect Coffee with Chemistry Equipment - DIY Siphon Brewer

732 views / 0 likes - added 5 years ago

Learn how to build a siphon brewer using chemistry lab equipment that brews the perfect cup of coffee. Follow along as Craig Beals from https://www.BealsScience.com shows how to build the siphon brewer and explains the science of how the siphon brewing de
02:10 Popular
Repeated Addition Example | Addition And Subtraction Within 100 | Early Math | Khan Academy

730 views / 0 likes - added 8 years ago

Learn how to solve word problems by adding the same number many times. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-skip-counting/e/repeated-addition?utm_so
01:42 Popular
How To Grow Fluorescent Flowers (Chemistry Life Hacks)

729 views / 1 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions Check out the NSF's Center for Sustainable Nanotechnology Blog! http://sustainable-nano.com/ Got a special someone you want to impress? Check out this life hack on how to turn white flowers into fluorescent masterpiec
11:55 Popular
Partial Pressures&Vapor Pressure: Crash Course Chemistry #15

728 views / 0 likes - added 9 years ago

This week we continue to spend quality time with gases, more deeply investigating some principles regarding pressure - including John Dalton's Law of Partial Pressures, vapor pressure - and demonstrating the method for collecting gas over water. Table of
51:15 Popular
Khan Academy Live: SAT Writing

728 views / 0 likes - added 6 years ago

Need help with SAT writing? Join Eric, one of Khan Academy’s SAT experts, for a live SAT writing class Tuesday, May 30 at 7 pm ET/4pm PT. It’s free! Eric will walk through key grammar concepts like subject-verb agreement and sentence punctuation. Can’t ma
03:00 Popular
Teens As Sums With 10 | Place Value (tens And Hundreds) | Early Math | Khan Academy

727 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-place-value-topic/cc-early-math-teens/e/teen-numbers-1?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch the next lesson: https:
02:03 Popular
Estimating Lengths | Measurement And Data | Early Math | Khan Academy

726 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-math-compare-estimate-length/e/estimating-lengths?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch
02:10 Popular
Subtract Tens Exercise | Addition And Subtraction Within 100 | Early Math | Khan Academy

724 views / 1 likes - added 8 years ago

Learn how to add and subtract tens. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-ones-tens/e/subtract-tens?utm_source=YT&utm_medium=Desc&utm_campaign=Ea
03:38 Popular
Math Patterns Example 1 | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

722 views / 0 likes - added 8 years ago

Part of our exploration of math is learning to identify patterns among numbers. Can you see the pattern in this example? Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/exercise/math-patterns?utm_source=YT&utm_mediu
03:42 Popular
The Truth About Wasabi - Speaking of Chemistry

722 views / 0 likes - added 7 years ago

Oh, you love that spicy wasabi kick…except you’ve probably never tasted real wasabi. Sarah Everts explains. Don’t forget to subscribe! http://bit.ly/ACSReactions ↓↓Full description and references below↓↓ Unless you’ve had a sushi chef grate a $50 wasabi s
04:55 Popular
Coffee Chemistry!

719 views / 0 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions Special thanks to William Sefton and Cait Lowry at The Coffee Bar (http://www.thecoffeebardc.com/) It’s one of the most popular beverages in the world, and many of us rely on it to stay awake every day. But not every
02:38 Popular
Adding 5 + 3 + 6 | Addition And Subtraction Within 20 | Early Math | Khan Academy

717 views / 0 likes - added 8 years ago

Learn how to add 5 + 3 + 6. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-add-20/e/adding-three-numbers?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath W
03:18 Popular
Counting Dollars | Measurement And Data | Early Math | Khan Academy

717 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-math-money/v/counting-dollars?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch the next lesson: htt
05:33 Popular
Right Triangle Word Problems — Harder Example | Math | New SAT | Khan Academy

716 views / 0 likes - added 8 years ago

Watch Sal work through a harder Right triangle word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s6-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
11:38 Popular
Bonding Models and Lewis Structures: Crash Course Chemistry #24

715 views / 0 likes - added 9 years ago

Models are great, except they're also usually inaccurate. In this episode of Crash Course Chemistry, Hank discusses why we need models in the world and how we can learn from them... even when they're almost completely wrong. Plus, Lewis Structures! -- Tab
03:14 Popular
Percents — Basic Example | Math | New SAT | Khan Academy

715 views / 0 likes - added 8 years ago

Watch Sal work through a basic Percents problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q2-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the prev
02:55 Popular
Place Value Example With 25 | Place Value (tens And Hundreds) | Early Math | Khan Academy

715 views / 0 likes - added 8 years ago

Learn to see 25 as 2 tens and 5 ones. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-place-value-topic/cc-early-math-tens/e/groups-of-tens?utm_source=YT&utm_medium=Desc&utm_campaign=Ea
03:19 Popular
Adding 8 + 7 | Addition And Subtraction Within 20 | Early Math | Khan Academy

714 views / 0 likes - added 8 years ago

Learn how to add 8 + 7 by making a group of ten. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-add-20/e/addition_2?utm_source=YT&utm_medium=Desc&utm_campaign=
01:41 Popular
Who Lives in a Pineapple Covered in ACID?!? | ACID BLAST

714 views / 1 likes - added 6 years ago

What happens when you pour ACID onto a PINEAPPLE? NICK'S CHANNEL ►► https://www.youtube.com/user/NickUhas Hosted by Nick Uhas Nickipedia: https://www.youtube.com/nickipedia Twitter: http://www.twitter.com/nickuhas Instagram: http://www.instagram.com/nicku
04:54 Popular
Cool Science Experiment with Sugar and Sulfuric Acid

714 views / 0 likes - added 5 years ago

Sugar and Sulfuric Acid - Amazing Science Experiments with Home Science Watch this cool science experiment with Sulfuric Acid and Sugar. Sulfuric acid (96%) is mixed with sugar, which is attacked by the acid. The final products are carbon, water vapor, an
05:41 Popular
Math Patterns Example 2 | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

713 views / 0 likes - added 8 years ago

We continue to strengthen our skill in identifying patterns. This time we'll use a table to track the pattern. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/exercise/math-patterns?utm_source=YT&utm_medium=Desc&utm
08:21 Popular
Solutions: Crash Course Chemistry #27

707 views / 0 likes - added 9 years ago

This week, Hank elaborates on why Fugu can kill you by illustrating the ideas of solutions and discussing molarity, molality, and mass percent. Also, why polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes. All that plus
05:45 Popular
Hypergolic Fuels – The Chemistry Of A Rocket Launch

706 views / 0 likes - added 8 years ago

Chemist Andrea Sella combines dimethylhydrazine with dinotrogen tetroxide to show how hypergolic mixtures fire rockets into space. Part of A Place Called Space, our 2015 advent calendar: http://rigb.org/advent Subscribe for regular science videos: http://
02:58 Popular
Monkeys For A Party | Place Value (tens And Hundreds) | Early Math | Khan Academy

706 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-place-value-topic/cc-early-math-teens/e/teen-numbers-1?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch the next lesson: https:
08:02 Popular
Wade's Rules - Periodic Table Of Videos

704 views / 0 likes - added 9 years ago

Kenneth Wade recently passed away. Here we discuss his time as a student in Nottingham and his famous (in some chemistry circles) Wade's Rules. Speaking in this video are Martyn Poliakoff and Debbie Kays. More chemistry at http://www.periodicvideos.com/ F
05:20 Popular
The One Where We Put Stuff in Acid

701 views / 0 likes - added 6 years ago

Subscribe! http://bit.ly/ACSReactions Acids are reactive, and even weak acids like vinegar can wow students with their reactivity. But strong acids can really put on a show, dissolving otherwise relatively inert metals. And aqua regia, or royal water, is
Featured
03:52
Right Triangle Word Problems — Basic Example | Math | New SAT | Khan Academy

700 views / 0 likes - added 8 years ago

Watch Sal work through a basic Right triangle word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s2-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
03:50
Adjectives and commas | Adjectives | Khan Academy

700 views / 1 likes - added 6 years ago

When using more than one adjective, sometimes you put a comma between them and sometimes you don't. Learn how to tell when you need a comma in this video! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-modifier/e/commas-
06:10
Acid and Alkali (THERMAL IMAGING) - Periodic Table of Videos

696 views / 0 likes - added 7 years ago

Acid and Alkali in water... look with thermal imaging. Our thanks to the Google Making & Science team. #ScienceGoals More #ScienceGoals videos at: https://www.youtube.com/playlist?list=PLIsr6chyjBJutgMPQ18jHPyejaOxklf9A All the elements: http://bit.ly/118
04:03
Subtracting 14 - 6 | Addition And Subtraction Within 20 | Early Math | Khan Academy

694 views / 0 likes - added 8 years ago

Learn how to subtract 14 - 6 by first thinking about subtracting 2 and 4. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-sub-20/e/subtraction_2?utm_source=YT&u
04:19
Cousin Fal's Shape Collection | Geometry | Early Math | Khan Academy

694 views / 0 likes - added 8 years ago

Learn how to classify shapes based on their number of sides, number of corners, and side-lengths. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-shapes/e/n
03:36
Addition Using Groups Of 10 Intro | Addition And Subtraction Within 100 | Early Math | Khan Academy

694 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-making-groups-of-ten/e/making-100?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch the next lesson: h
12:47
Stoichiometry: Chemistry for Massive Creatures - Crash Course Chemistry #6

692 views / 0 likes - added 9 years ago

Chemists need stoichiometry to make the scale of chemistry more understandable - Hank is here to explain why, and to teach us how to use it. Table of Contents Atomic Mass Units 2:24 Moles 5:12 Molar Mass 5:59 Equation Balancing 8:45 Molar Ratios 11:11 Cra
05:32
Exercising Gorillas | Addition And Subtraction Within 20 | Early Math | Khan Academy

692 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-word-problems-within-20/e/addition-and-subtraction-word-problems-within-20--level-2?utm_source=YT&utm_medium=Des
02:31
Perfect Aspect | The parts of speech | Grammar | Khan Academy

690 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
03:18
Why does your hair turn gray? – Speaking of Chemistry

689 views / 0 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions It’s an inevitable side effect of longevity: your hair will turn gray. In this episode, Sophia Cai chats about the chemistry of your natural hair color, why it eventually turns white, and how scientists may be able to
03:31
Fence Posts For Horses | Addition And Subtraction Within 100 | Early Math | Khan Academy

688 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-100-word-problems/e/addition-and-subtraction-word-problems-within-100--level-1?utm_source=YT&utm_medium
03:37
Starfish Rulers | Addition And Subtraction Within 100 | Early Math | Khan Academy

686 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-more-fewer-100/e/addition-and-subtraction-word-problems-within-100--level-4?utm_source=YT&utm_medium=Desc&utm_c
04:28
Science For Kids – How To Make Bouncing Eggs – ExpeRimental #12

684 views / 1 likes - added 8 years ago

Make bouncy eggs and experiment with the chemistry of liquids around the house in this science activity to do with children. For info sheets and printable badges, click here: http://bit.ly/EggspeRiments ExpeRimental is a series of videos showing fun, chea
Featured
05:50
How to make electronic skin with Stanford's Zhenan Bao—Speaking of Chemistry Road Trip

684 views / 0 likes - added 7 years ago

The Speaking of Chemistry California road trip continues as we scope out some cutting-edge, flexible electronics at Stanford University. Don’t forget to subscribe! http://bit.ly/ACSReactions ↓↓Full description and references below↓↓ Stanford’s Zhenan Bao
04:44
What Happens If Acid Touches Your Body? - Dear Blocko #20

682 views / 1 likes - added 4 years ago

This video is sponsored by Privacy.com. Protect your financial identity online using virtual cards and get $5 off your first purchase at http://privacy.com/lifenogginIt's Dear Blocko #20! Does the human body really dissolve in acid?Subscribe: https://bit.
16:14
Lin Alg: Projections onto subspaces with orthonormal bases

681 views / 0 likes - added 9 years ago

Projections onto subspaces with orthonormal bases More free lessons at: http://www.khanacademy.org/video?v=we829K4NOq8
03:55
The Chemistry of Heavy Water, Argon & Flamingos – Monthly Mailbag #6

681 views / 0 likes - added 7 years ago

Can you drink a whole glass of heavy water? What is Argon used for? Do flamingos have red and blue pigment in their feathers? Jon answers questions from the comments. Subscribe for weekly science videos: http://bit.ly/RiSubscRibe Watch the original films!
03:56
Chemistry Life Hacks: Food Edition

681 views / 0 likes - added 6 years ago

Subscribe! http://bit.ly/ACSReactions Reactions is back with another round of chemistry life hacks. Our latest episode brings chemistry to the kitchen, and features science-backed tips to cook rice with fewer calories, get extra juicy chicken (when you do
02:16
Telling Time Exercise Example 2 | Measurement And Data | Early Math | Khan Academy

680 views / 0 likes - added 8 years ago

Tell time on unlabeled analog clocks. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-math-time/e/telling_time?utm_source=YT&utm_medium=Desc&utm_campaign=Ear
05:00
Exploding Hydrogen Bubbles

679 views / 0 likes - added 9 years ago

The title pretty much says it. More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos From the School of Chemistry at The University of Nottingha
05:12
Ellipses | Punctuation | Khan Academy

677 views / 0 likes - added 6 years ago

Ellipses are three little dots that we use to show a pause or that a portion of a quote has been removed. Learn how to use them in this video. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/introd
11:16
Linear Algebra: Introduction to Orthonormal Bases

676 views / 0 likes - added 9 years ago

Looking at sets and bases that are orthonormal -- or where all the vectors have length 1 and are orthogonal to each other. More free lessons at: http://www.khanacademy.org/video?v=7BFx8pt2aTQ
11:31
Precipitation Reactions: Crash Course Chemistry #9

674 views / 0 likes - added 9 years ago

A lot of ionic compounds dissolve in water, dissociating into individual ions. But when two ions find each other that form an insoluble compound, they suddenly fall out of solution in what's called a precipitation reaction. In this episode of Crash Course
03:11
Introduction To Addition | Basic Addition And Subtraction | Early Math | Khan Academy

672 views / 0 likes - added 8 years ago

Learn what it means to add. The examples used in this video are 1+1 and 2+3. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-sub-intro/e/addition_1?utm_
04:52
Possessive pronouns | The parts of speech | Grammar | Khan Academy

672 views / 0 likes - added 6 years ago

We can use pronouns to show possession relationships, describing what things belong to which people, like "her shoe" or "the book is mine." Possessive pronouns come in two flavors: adjective and noun! David, KA's resident grammarian, covers the difference
03:22
Linear And Quadratic Systems — Harder Example | Math | New SAT | Khan Academy

668 views / 0 likes - added 8 years ago

Watch Sal work through a harder Linear and quadratic systems problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p4-easier?utm_source=YT&utm_medium=Desc&utm_campaign=N
06:40
Barking Dog (slow Motion) - Periodic Table Of Videos

667 views / 0 likes - added 9 years ago

Barking Dog reaction at 3000 frames per second. More about filming & editing this video: http://youtu.be/vfKUG11FKGE The Barking Dog is combustion of nirous oxide (laughing gas) and sulfur dioxide. This video features Martyn Poliakoff, Pete Licence and Da
07:44
Super Expensive Metals - Periodic Table Of Videos

667 views / 0 likes - added 9 years ago

Inside a Noble Metals factory, where even the dust on your shoes is too valuable to ignore! See also our gold bullion video: http://youtu.be/CTtf5s2HFkA See platinum, iridium, rhodium and palladium (and some gold). Filmed at Johnson Matthey - our thanks t
07:20
Old And New Labs - Periodic Table Of Videos

667 views / 0 likes - added 8 years ago

With one eye on the past, The Professor shows us the new teaching lab at the University of Nottingham's School of Chemistry! Featuring Professor Sir Martyn Poliakoff. Hydrogen Bubbles: https://www.youtube.com/watch?v=d49TzVF1gmY Exploding Pianos: https://
07:39
Seaborgium Chemistry - Periodic Table Of Videos

666 views / 0 likes - added 9 years ago

Scientists create Seaborgium hexacarbonyl from the short-lived element. More on Seaborgium: http://youtu.be/UWq0djr790E More on heavy elements: http://youtu.be/z3oY-XHwss8 The paper referenced in this video (subscription only) at: http://www.sciencemag.or
02:34
Subjects and predicates | Syntax | Khan Academy

666 views / 0 likes - added 6 years ago

A subject is the noun or pronoun-based part of a sentence, and a predicate is the verb-based part that the subject performs. Let’s explore how that works in context. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/syntax/e/id
02:23
Isolating Quantities — Harder Example | Math | New SAT | Khan Academy

665 views / 0 likes - added 8 years ago

Watch Sal work through a harder Isolating quantities problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p13-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT M
04:43
Subject, direct object, and indirect object | Syntax | Khan Academy

664 views / 0 likes - added 6 years ago

A subject is the noun phrase that drives the action of a sentence; in the sentence “Jake ate cereal,” Jake is the subject. The direct object is the thing that the subject acts upon, so in that last sentence, “cereal” is the direct object; it’s the thing J
1:02:43
Khan Academy Live: AP US History

662 views / 0 likes - added 6 years ago

Taking AP US History? Prep for the AP exam with our free live tutoring session. Kim, our history expert, will share tips and strategies for the exam. Study for AP US History on Khan Academy: https://www.khanacademy.org/humanities/us-history/ap-us-history
03:53
Adding 7 + 6 | Addition And Subtraction Within 20 | Early Math | Khan Academy

660 views / 0 likes - added 8 years ago

Learn how to add 7 + 6 using the number line. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-add-20/e/addition_2?utm_source=YT&utm_medium=Desc&utm_campaign=Ear
04:19
Snow On Friday | Addition And Subtraction Within 100 | Early Math | Khan Academy

660 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-100-word-problems/e/addition-and-subtraction-word-problems-within-100--level-2?utm_source=YT&utm_medium
05:05
Parallel structure | Syntax | Khan Academy

660 views / 0 likes - added 6 years ago

Parallel structure isn’t a set rule, but more of a stylistic choice: it helps sentence elements maintain a pattern. This is a very special episode because it’s Paige’s last video with us as a KA intern! We will miss having Paige as a contributor to the Gr
10:43
How To Speak Chemistrian: Crash Course Chemistry #11

659 views / 0 likes - added 9 years ago

Learning to talk about chemistry can be like learning a foreign language, but Hank is here to help with some straightforward and simple rules to help you learn to speak Chemistrian like a native. Table of Contents Determining Formulas and Names of Monatom
02:49
Circle Equations — Harder Example | Math | New SAT | Khan Academy

658 views / 0 likes - added 8 years ago

Watch Sal work through a harder Circle equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s3-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the pr
04:44
The Professor In Russia - Periodic Table Of Videos

657 views / 0 likes - added 9 years ago

Professor Poliakoff and Ruthenium - discovered by Karl Claus and named after Russia. More Christmas stuff at http://periodicvideos.blogspot.co.uk/2013/12/a-christmas-lecture.html The Professor thanks the Academy of Sciences of the Republic of Tatarstan fo
02:51
Telling Time Exercise Example 1 | Measurement And Data | Early Math | Khan Academy

656 views / 0 likes - added 8 years ago

Tell time on a labeled analog clock. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-math-time/e/telling_time_0.5?utm_source=YT&utm_medium=Desc&utm_campaign=
03:15
Personal pronouns | The parts of speech | Grammar | Khan Academy

654 views / 0 likes - added 6 years ago

Let's meet the personal pronouns! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/e/meet-the-personal-pronoun?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next less
09:26
Energy&Chemistry: Crash Course Chemistry #17

653 views / 0 likes - added 9 years ago

Grumpy Professor Hank admits to being wrong about how everything is chemicals. But he now wants you to listen as he blows your mind with a new sweeping statement: everything (yes, really everything this time) is energy. What?! This week, Hank takes us on
07:37
Introduction to reaction quotient Qc | Chemical equilibrium | Chemistry | Khan Academy

653 views / 0 likes - added 6 years ago

Introduction to the reaction quotient Qc, and how to use the reaction quotient to predict how the reaction concentrations will change. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its
04:30
Losing Fingers To Chemistry - Periodic Table Of Videos

648 views / 1 likes - added 9 years ago

The Prof is back in the lab with a Potassium Dichromate reaction and a story of lost fingers! More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvid
07:14
Content Changes To The New SAT | Tips & Planning | New SAT | Khan Academy

648 views / 0 likes - added 9 years ago

Sal covers the major content changes to the new SAT. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-math-test-intro?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous l
03:37
Sal teaches Grover about the electoral college

645 views / 0 likes - added 7 years ago

Sal helps our favorite Sesame Street character understand how we elect the president of the United States. Check out more lessons about American civics on Khan Academy at http://www.khanacademy.org. And vote November 8 if you’re eligible!
Featured
04:57
Irregular plural nouns | foreign plurals | The parts of speech | Grammar | Khan Academy

645 views / 0 likes - added 6 years ago

You don't need to know how to speak Latin and Greek in order to understand English, but some words in English come from those languages. It's helpful to know how some Greek and Latin words change from singular to plural. Practice this yourself on Khan Aca
03:32
Three types of sentence | Syntax | Khan Academy

644 views / 0 likes - added 6 years ago

Three essential types of sentence are declarative sentences (which are statements), interrogative sentences (which are questions), and imperative sentences (which are orders). Join us as we give examples of each! Practice this yourself on Khan Academy rig
07:00
Abstract-ness | Introduction To Algebra | Algebra I | Khan Academy

643 views / 0 likes - added 8 years ago

The general idea behind the word 'abstract' Watch the next lesson: https://www.khanacademy.org/math/algebra/introduction-to-algebra/overview_hist_alg/v/the-beauty-of-algebra?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI Missed the previous lesson? h
09:57
Kinetics: Chemistry's Demolition Derby - Crash Course Chemistry #32

641 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
05:05
Light Bulb In Hydrofluoric Acid (HF)

641 views / 0 likes - added 9 years ago

We dunk a glowing lightbulb in HF - an acid famed for being disagreeable with glass. Discuss on Brady's subreddit: http://redd.it/2mrnyw More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And o
10:59
The Creation of Chemistry - The Fundamental Laws: Crash Course Chemistry #3

640 views / 0 likes - added 9 years ago

Today's Crash Course Chemistry takes a historical perspective on the creation of the science, which didn't really exist until a super-smart, super-wealthy Frenchman put the puzzle pieces together - Hank tells the story of how we went from alchemists to ch
08:26
Peptide Bond Formation

640 views / 0 likes - added 8 years ago

How amino acids (including ones in zwitterion form) form peptide bonds (peptide linkages) through a condensation reaction (dehydration synthesis).
03:49
How Sniffing Priceless Art and Artifacts Could Save Them — Speaking of Chemistry

638 views / 0 likes - added 7 years ago

Art and cultural heritage conservators are getting an assist from some smelly chemistry. Don't forget to subscribe for all the latest Speaking of Chemistry videos: http://bit.ly/ACSReactions ↓↓Full description and references below↓↓ Come closer, lean in,
03:00
Appositives | Punctuation | Grammar | Khan Academy

634 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, cover appositives and how to use commas along with them. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/appositives?utm_source=YT&utm_med
04:53
Subject-verb agreement | Syntax | Khan Academy

633 views / 0 likes - added 6 years ago

Agreement is the art of making sure that sentence parts agree with one another; you want to make sure that your subjects and verbs match up. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/syntax/e/subject-verb-agreement Watc
10:44
Buffer Capacity

632 views / 0 likes - added 8 years ago

The definition of buffer capacity, and an example showing why it depends on the absolute concentrations of the conjugate acid and base.
03:16
Understanding Place Value While Adding Tens | Early Math | Khan Academy

628 views / 0 likes - added 8 years ago

Learn how to add 23 + 30 by thinking about place value. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-ones-tens/e/add-within-100--level-1?utm_source=YT&u
07:21
2014 Nobel Prize In Chemistry - Periodic Table Of Videos

627 views / 0 likes - added 9 years ago

The 2014 Nobel Prize in Chemistry is awarded to Eric Betzig, Stefan Hell and William Moerner. More chem Nobel Prizes: http://bit.ly/periodicnobel The 2014 Physics Nobel Prize: http://youtu.be/_DjHR4PWYOs Hair in microscope: http://youtu.be/cQU2IAsQak8 DNA
06:41
Xenon Bonds - Periodic Table Of Videos

625 views / 0 likes - added 9 years ago

Asked about "special bonds" - the Professor recalls some chemical tales involving "unreactive" Xenon. Water Balloons from Sixty Symbols: http://youtu.be/nacPIOb68Ws More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.faceb
06:49
Useful Diamonds - Periodic Table Of Videos

622 views / 0 likes - added 9 years ago

More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos From the School of Chemistry at The University of Nottingham: http://www.nottingham.ac.uk/
03:43
Right Triangle Geometry — Harder Example | Math | New SAT | Khan Academy

621 views / 0 likes - added 8 years ago

Watch Sal work through a harder Right triangle geometry problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s4-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed
02:16
Welcome to our Hour of Code on Khan Academy

619 views / 0 likes - added 8 years ago

Ready to start learning to program? It's 100% FREE and all you need to do is follow this link to get started now! https://www.khanacademy.org/hourofcode
Featured
04:32
The Zeroth Power | Arithmetic Operations | 6th Grade | Khan Academy

618 views / 0 likes - added 8 years ago

Learn why a number raised to the zero power equals 1. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-arithmetic-operations/cc-6th-exponents/e/positive_and_zero_exponents?utm_source=Y
01:26
Introduction to verbs | The parts of speech | Grammar | Khan Academy

618 views / 0 likes - added 6 years ago

Let's explore what verbs are, and what they do! David, KA's Grammar Fellow, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/identifying-verbs?utm_source=YT&utm_medium
10:00
Introduction To Number Systems And Binary | Pre-Algebra | Khan Academy

616 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/v/hexadecimal-number-system?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.
04:21
Introduction To The SAT Reading Test | Tips & Planning | New SAT | Khan Academy

615 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-writing-test-intro?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous lesson? https://www.khanacademy.org/test-prep/new-s
04:13
Huge Fire At Our Chemistry Building

614 views / 0 likes - added 9 years ago

Professor Poliakoff on the blaze at the University of Nottingham's new chemistry building. Blog by the university's Vice-Chancellor at: http://bit.ly/VCNottsFire More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook
02:06
Bay Area CBS Station with Salman Khan

612 views / 1 likes - added 9 years ago

Bay Area CBS Station with Salman Khan Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
05:40
Old School Professor - Periodic Table Of Videos

611 views / 0 likes - added 9 years ago

Professor Martyn Poliakoff visits Westminster School, where he scored 6 out of 10 on his first chemistry experiment! The Prof gave the annual Tizard Lecture. More at: http://www.youtube.com/watch?v=4CK4WHElb4Q Here is his Nyholm Lecture: http://www.youtub
03:45
Introduction to the possessive | The Apostrophe | Punctuation | Khan Academy

609 views / 0 likes - added 6 years ago

Apostrophes can help show when something belongs to someone. Paige and David explain how! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-apostrophe/e/introduction-to-the-possessive-case Watch the next lesson: https://www
01:32
Simple Aspect | The parts of speech | Grammar | Khan Academy

609 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
08:05
Sal Khan Has Conversation With MIT Dean Of Admissions

608 views / 0 likes - added 8 years ago

Sal Khan has conversation with MIT Dean of Admissions Stu Schmill.
04:50
Introduction to the apostrophe | The Apostrophe | Punctuation | Khan Academy

608 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, introduce a new piece of punctuation: the apostrophe! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-comma/e/introduction-to-the-apostrophe Watch the next lesson: https://www.k
04:29
How Bacteria Make It Rain (with Kim Prather) – Speaking of Chemistry Road Trip

606 views / 0 likes - added 7 years ago

Did you know that the ocean launches bacteria and other goo into the atmosphere? And that those particles can seed clouds? Atmospheric chemist Kimberly Prather of UCSD and the Scripps Institution of Oceanography drops some serious knowledge on us. ↓↓More
04:38
Run-ons and comma splices | Syntax | Khan Academy

606 views / 0 likes - added 6 years ago

A run-on sentence doesn’t separate any of its independent clauses with the punctuation that it needs, and a comma splice incorrectly separates two independent clauses with a comma, instead of a comma-and-coordinating-conjunction. Practice this yourself on
02:39
Chemistry Dubstep

605 views / 1 likes - added 9 years ago

Check these samples. Created solely from sounds recorded in our labs. Music/video by Dave & Adam - check their channel for more creations: http://bit.ly/boyinaband Behind the scenes (including interview with Dave and Adam): http://www.youtube.com/watch?v=
03:04
The Chemistry of Redheads

604 views / 1 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions St. Paddy's Day is just around the corner, and so instead of celebrating with a glass of green beer, these year we decided to take a closer, chemical look into what makes redheads stand out from the crowd. It might su
Featured
08:56
DNA Spell Checker (2015 Nobel Prize In Chemistry) - Periodic Table Of Videos

601 views / 0 likes - added 8 years ago

The 2015 Nobel Prize in Chemistry is awarded "for mechanistic studies of DNA repair". The recipients are Paul L. Modrich, Tomas Lindahl and Aziz Sancar. Discussed by Professor Sir Martyn Poliakoff. More chemistry Nobel Prize videos: http://bit.ly/periodic
13:11
Overview Of Cellular Respiration

600 views / 0 likes - added 8 years ago

Overview of cellular respiration. Overview of glycolysis, the Citric Acid/Krebs Cycle and oxydative phosphorylation.
04:47
Who versus whom | The parts of speech | Grammar | Khan Academy

599 views / 0 likes - added 6 years ago

When do you use who, and when do you use whom? David, KA's grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/e/relative-pronouns?utm_source=YT&utm_medium=Desc&u
08:09
Chemistry Dubstep (behind The Scenes)

598 views / 0 likes - added 9 years ago

How Dave and Adam created out chemistry dusbtep video - see the main video at http://www.youtube.com/watch?v=TcvZL6fx-lU Visit Dave and Adam's channel at: http://bit.ly/boyinaband More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at h
04:19
Dangling modifiers | Syntax | Khan Academy

597 views / 0 likes - added 6 years ago

A modifying word or phrase “dangles” when it doesn’t apply to the word it’s supposed to modify. Learn how to spot and fix this problem! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/syntax/e/dangling-modifiers/ Watch the ne
10:57
BONUS: History of the possessive apostrophe | The Apostrophe | Punctuation | Khan Academy

596 views / 0 likes - added 6 years ago

David, Paige, and Jake cover the fascinating history of the possessive apostrophe. Stay tuned for this bonus video! Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe/v/bonus-history-of-the-ap
03:14
The irregular verb gets taken for a ride | Grammar | Khan Academy

593 views / 0 likes - added 6 years ago

This group of irregular verbs have vowel sounds that change in a predictable way, when they go from the present to the past tense. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs
09:32
Manganese (new) - Periodic Table Of Videos

592 views / 0 likes - added 9 years ago

A new video on the element Manganese. Reddit discussion: http://redd.it/2yhmrv Featuring Sir Martyn Poliakoff and Dr Samantha Tang. More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twi
04:15
Did Comets Kickstart Life on Earth? — Speaking of Chemistry

592 views / 0 likes - added 7 years ago

That's right. Comets may have helped seed life on Earth. Far out, right? Sarah Everts has the chemical clues that back up this out-of-this-world hypothesis. ↓↓More info and references below↓↓ Comet collisions may have helped seed life on Earth | C&EN http
1:10:07
Khan Academy Live: AP Calculus

592 views / 0 likes - added 6 years ago

Taking AP Calculus? Prep for the exam with our free live tutoring session. Dave, one of our calculus experts, will review key concepts, solve sample questions, and share ways to avoid common mistakes. Prep for your AP Calculus exams on Khan Academy: https
05:00
Rhodium - Periodic Table Of Videos

590 views / 0 likes - added 9 years ago

We've made a new Rhodium video following our visit to Johnson Matthey's Noble Metals factory! More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvid
04:31
Copper Sulfate (slow Motion) - Periodic Table Of Videos

590 views / 1 likes - added 9 years ago

Copper Sulfate and Ammonia at high speed - watch the colour change and precipitation. More chemistry in slow motion: http://bit.ly/chemslomo Featuring Professor Martyn Poliakoff from the University of Nottingham. More chemistry at http://www.periodicvideo
08:26
Conjugate acid-base pairs | Acids and bases | Chemistry | Khan Academy

589 views / 0 likes - added 6 years ago

Introduction to conjugate acid-base pairs. Definition and examples of conjugate acid-base pairs. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivit
05:53
Comparing Q vs K example | Chemical equilibrium | Chemistry | Khan Academy

589 views / 0 likes - added 6 years ago

A worked example using reaction quotient Q to predict how concentrations will shift so the reaction can get to equilibrium. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acids-and-bases-topic/acids-and-bases/v/arrhenius-definition-o
02:52
Three ways to end a sentence | Punctuation | Khan Academy

588 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, introduce the three ways to end a sentence: the period, the exclamation point, and the question mark. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-comma/e/three-ways-to-end-a
08:59
More Organic Chemistry Naming Examples 1

587 views / 0 likes - added 9 years ago

More Organic Chemistry Naming Examples 1
03:19
Magic Jug - Periodic Table Of Videos

587 views / 0 likes - added 9 years ago

Some colour change reactions demonstrated by Dr Sam Tang from the University of Nottingham. More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideo
05:48
Platinum - Periodic Table Of Videos

586 views / 0 likes - added 9 years ago

Here's a new video about Platinum - but we've done so many here's a platinum playlist: http://bit.ly/PeriodicPt Videos on all the elements:http://bit.ly/118elements More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.faceb
03:07
500th Video - Periodic Table Of Videos

585 views / 0 likes - added 9 years ago

Some memories from our first 500 videos - thank you everyone who watches and encourages us. Music by Alan Stewart - more from him at http://www.youtube.com/AlanKey86 A Q&A from The Prof to mark our 500th video: http://youtu.be/op1Dp1r66OE More chemistry a
01:51
Punctuating a list | Punctuation | Grammar | Khan Academy

585 views / 0 likes - added 6 years ago

Learn how to use commas to punctuate a written list of people, things, actions, or events. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/punctuating-lists?utm_source=YT&utm_medium=
14:49
pH, pOH of Strong Acids and Bases

584 views / 0 likes - added 9 years ago

Calculating the pH or pOH of strong acids and bases. More free lessons at: http://www.khanacademy.org/video?v=tS2YJPmKOFQ
18:37
Acid Base Introduction

581 views / 0 likes - added 9 years ago

Arrhenius, Bronsted Lowry, and Lewis Acids and Bases. More free lessons at: http://www.khanacademy.org/video?v=vShCnTY1-T0
11:35
Real Gases: Crash Course Chemistry #14

577 views / 0 likes - added 9 years ago

Hank bursts our ideal gas law bubble, er, balloon, and brings us back to reality, explaining how the constants in the gas law aren't all that constant; how the ideal gas law we've spent the past two weeks with has to be corrected for volume because atoms
01:50
Introduction to verb aspect | The parts of speech | Grammar | Khan Academy

576 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
01:53
The funky -ed irregular verb | The parts of speech | Grammar | Khan Academy

572 views / 1 likes - added 6 years ago

These are the most regular of the irregular verbs; while they don't behave exactly like regular verbs, like present tense "walk" become past tense "walked", they do maintain the "-ed" sound. It's just spelled differently. Practice this yourself on Khan Ac
04:18
How to use italics and underlines | Punctuation | Khan Academy

571 views / 0 likes - added 6 years ago

Learn how to use italics and underlines when writing the titles of works or when emphasizing a particular word or phrase. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/italics--underlines--and-qu
08:22
Fighting Malaria With Green Chemistry - Periodic Table Of Videos

570 views / 0 likes - added 9 years ago

The Professor and his colleagues devise greener ways to produce the anti-Malaria drug Artemisinin. Artemisinin was first discovered in China. The main article: http://bit.ly/1FaQNci Additional info: http://bit.ly/Malaria_Supplementary This video features
03:13
Using quotation marks in titles | Punctuation | Khan Academy

569 views / 0 likes - added 6 years ago

Learn how to use quotation marks to title things like poems, songs, and episodes of TV shows. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/italics--underlines--and-quotes/ Watch the next lesson:
04:34
What is a sentence? | Syntax | Khan Academy

568 views / 0 likes - added 6 years ago

A sentence is a grammatically complete idea. All sentences have a noun or pronoun component called the subject, and a verb part called the predicate. David and Paige explore this division across several different example sentences. Watch the next lesson:
03:29
Introduction to irregular verbs | The parts of speech | Grammar | Khan Academy

568 views / 0 likes - added 6 years ago

Words like "walk" and "look" are regular verbs – they behave in a predictable way. But there's a whole class of words in English, called irregular verbs, that are harder to predict. David, KA's Grammar Fellow, explains. Practice this yourself on Khan Acad
04:11
Advanced (plural) possession | The Apostrophe | Punctuation | Khan Academy

566 views / 0 likes - added 6 years ago

Paige and David talk about using apostrophes to show that something belongs to multiple people. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe/e/advanved--plural--possesion Watch
03:42
The Legal Battle over CRISPR — Speaking of Chemistry

564 views / 0 likes - added 7 years ago

We went to the U.S. Patent & Trademark Office to get the lowdown on the CRISPR gene-editing patent dispute. Read C&EN’s coverage here: http://cen.acs.org/articles/94/web/2016/12/CRISPR-creators-duke-US-patent.html ↓↓Full description and references below↓↓
01:34
Chemistry - Summer of STEM - Layered Liquid Towers

562 views / 1 likes - added 7 years ago

Chemistry! Today we create layered liquid towers! Chemistry Book: https://drive.google.com/file/d/0B-GbYsz_QH2WN0s0bUFCaE9PbnM/view?usp=sharing Printable Board Game and Stickers: https://drive.google.com/drive/u/1/folders/0B-GbYsz_QH2WLXNxblRoV0pWMU0?page
07:30
Carbonating a Drink With Sulfuric Acid?!

562 views / 0 likes - added 6 years ago

I carbonate a beverage using some chemistry. Help me make videos by donating here: https://www.patreon.com/CodysLab Follow me on Facebook: https://www.facebook.com/codydonreeder SubReddit: https://www.reddit.com/r/codyslab/
05:57
Chemistry Nobel Prize 2013 - Periodic Table Of Videos

561 views / 0 likes - added 9 years ago

More Nobel Prize videos from us: http://bit.ly/periodicnobel The 2013 Nobel Prize in Chemistry is shared by Martin Karplus, Michael Levitt and Arieh Warshel for their work in the field of computational chemistry. Professor Martyn Poliakoff discusses. More
05:45
How Do The Academy Awards Work?

560 views / 0 likes - added 8 years ago

Who is the mysterious ‘Academy’ and how do they pick which movies win at the Oscars? Join Ben to learn the occult science of Academy Awards. Learn more at HowStuffWorks.com: http://entertainment.howstuffworks.co... Share on Facebook: https://goo.gl/ySpZ2R
06:52
A Festival Full of Twins in Twinsburg

558 views / 0 likes - added 5 years ago

Welcome to Twins Days, the largest annual festival for biological twins in the world. Every summer since 1976, thousands of pairs of twins have convened in Twinsburg, Ohio, to celebrate the uniqueness of twinship. Read more: https://www.theatlantic.com/vi
07:50
Arrhenius Definition Of Acids And Bases

553 views / 0 likes - added 8 years ago

Arrhenius definition of acids and bases
09:02
Professor Q And A - Periodic Table Of Videos

552 views / 0 likes - added 9 years ago

Answering viewer questions to coincide with our 500th video. More Q&A at http://youtu.be/IsyQDWlszjQ - See 500th video at http://youtu.be/pp2WrHc4rmI More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodi
09:44
Analyzing A Resistor Circuit With Two Batteries

551 views / 0 likes - added 8 years ago

Analyzing a resistor circuit with two batteries | Circuits | Physics | Khan Academy
05:33
How Joe DeSimone is Changing 3-D Printing—Speaking of Chemistry Road Trip

551 views / 0 likes - added 7 years ago

We're hitting the road in California. Check out our first stop at Carbon, a 3-D printing startup in Silicon Valley. Don’t forget to subscribe! http://bit.ly/ACSReactions ↓↓Full description and references below↓↓ Joe DeSimone cofounded Carbon (formerly Car
09:03
Vintage Chemistry Computer Game - Periodic Table of Videos

551 views / 0 likes - added 6 years ago

See Computerphile on saving the software: https://youtu.be/vskNak4TeRs More links and info in full description ↓↓↓ And see Martyn play the other game: https://youtu.be/B07hBOTx1Ms Links to the games (on emulator or for download) and other material... http
06:44
BONUS VIDEO | Terminal Prepositions | Prepositions | The Parts Of Speech

544 views / 0 likes - added 8 years ago

It's totally okay to end sentences with prepositions! David, Khan Academy's grammarian-in-chief, explains the history and the context behind this long-held grammar myth. Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/gramma
1:42:57
The Chemistry of Fire and Gunpowder - with Andrew Szydlo

544 views / 0 likes - added 6 years ago

Andrew Szydlo gives a spectacular demo-filled talk of explosive science using gunpowder, energetic reactions and quite a few flames. Subscribe for regular science videos: http://bit.ly/RiSubscRibe The talk was filmed on the eve of Bonfire Night, also know
04:13
How to make tomatoes taste awesome again — Speaking of Chemistry

544 views / 0 likes - added 7 years ago

Supermarket tomatoes account for nearly 10% of produce sales in the U.S., but they taste terrible. What can be done to make them great again? Read more at http://cen.acs.org/articles/95/i5/flavor-facelift-supermarket-tomatoes.html?utm_source=YouTube&utm_m
17:47
Krebs / Citric Acid Cycle

543 views / 0 likes - added 9 years ago

Overview of the Krebs or Citric Acid Cycle More free lessons at: http://www.khanacademy.org/video?v=juM2ROSLWfw
02:11
Perfect progressive aspect | The parts of speech | Grammar | Khan Academy

540 views / 0 likes - added 6 years ago

We use the perfect progressive aspect to talk about an action that was once ongoing, but has since completed, like "I had been waiting for twenty minutes." Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/pa
04:28
Are We Running Out of Vanilla? — Speaking of Chemistry

537 views / 0 likes - added 7 years ago

Vanilla is so common, some people use it as a diss. But watch out. This beloved bean may become a rarity. Read more: http://cen.acs.org/articles/94/i36/problem-vanilla.html ↓↓More info and references below↓↓ Special thanks to My Green Pets for sharing the
06:19
AP Chemistry multiple choice sample: Boiling points

537 views / 1 likes - added 6 years ago

Comparing the boiling point of nonane and 2,3,4-trifluoropentane. A sample multiple choice problem from the 2014 AP course description.
04:35
Commas and introductory elements | Punctuation | Grammar | Khan Academy

534 views / 0 likes - added 6 years ago

In English, you use commas to separate introductory elements from the rest of a sentence. Find out how with David and Paige! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/commas-an
02:31
Choosing between its and it’s | The Apostrophe | Punctuation | Khan Academy

533 views / 1 likes - added 6 years ago

David and Paige explain the meaning of two English words that look and sound very similar but act very different: _its_ and _it's_. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe
05:34
Subject and object pronouns | The parts of speech | Grammar | Khan Academy

531 views / 0 likes - added 6 years ago

Before we get any further with pronouns, let's cover what the difference between a subject and an object pronoun is, because the distinction between those two concepts will start coming up a good deal. Practice this yourself on Khan Academy right now: htt
12:52
Chemical Weapons (Sarin Gas) - Periodic Table Of Videos

529 views / 0 likes - added 9 years ago

Discussing chemical weapons, including Sarin and Mustard Gas. Featuring professors Rob Stockman and Martyn Poliakoff from the University of Nottingham. Extra footage will be at: http://youtu.be/lay6VoWBQek More chemistry at http://www.periodicvideos.com/
02:51
The Four "New" Elements & How We Got Them–Speaking of Chemistry

529 views / 0 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions The periodic table just got four new elements, but this isn't as groundbreaking as recent headlines would have you believe. Join Speaking of Chemistry's resident killjoy to find out why. Seriously, though, this is som
04:39
Famous Science Spectacles - Periodic Table Of Videos

528 views / 0 likes - added 9 years ago

Joseph Priestley made a famous discovery - but it seems his eyesight wasn't too good? Royal Society (Romantic Chemistry Exhibition until June 14): http://royalsociety.org/events/2012/romantic-chemistry/ Professor Martyn Poliakoff is Foreign Secretary of t
05:46
Exploding Eggs - Making Hydrogen Gas from Acid

528 views / 0 likes - added 5 years ago

Craig Beals shows how to make hollow eggs explode by filling them with hydrogen gas. The gas is made by reacting hydrochloric acid with zinc metal. The single replacement reaction produces hydrogen gas which will combust in the presence of oxygen to make
02:45
Progressive Aspect | The parts of speech | Grammar | Khan Academy

528 views / 0 likes - added 6 years ago

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.o
05:28
Chicken In Acid Conclusion - Periodic Table Of Videos

527 views / 0 likes - added 9 years ago

Continues from: http://youtu.be/oipksRhISfM New channel - Objectivity: http://bit.ly/Objectivity Join Brady's mailing list: http://eepurl.com/YdjL9 More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicv
08:57
Bronsted-Lowry Definition Of Acids And Bases

527 views / 0 likes - added 8 years ago

Bronsted-Lowry definition of acids and bases. Conjugate acids and bases.
14:33
pKa and pKb Relationship

525 views / 0 likes - added 9 years ago

The pKa and pKb relationship between conjugate acids and bases (both of which are weak). More free lessons at: http://www.khanacademy.org/video?v=3Gm4nAAc3zc
06:35
New Element Confirmed - Periodic Table Of Videos

524 views / 0 likes - added 9 years ago

Element 115 is known as Ununpentium - but a proper name has moved another step closer! Follow us on Facebook at http://www.facebook.com/periodicvideos More chemistry at http://www.periodicvideos.com/ And on Twitter at http://twitter.com/periodicvideos Fro
04:51
Why Olive Oil is Awesome

524 views / 1 likes - added 6 years ago

Subscribe! http://bit.ly/ACSReactions Whether you sop it up with bread or use it to boost your cooking, olive oil is awesome. But a lot of chemistry goes on in that bottle that can make or break a product. Take the “extra virgin” standard: Chemistry tells
09:03
BONUS VIDEO | Singular They | The parts of speech | Grammar | Khan Academy

519 views / 0 likes - added 6 years ago

You may have been hearing a lot about the "singular they" recently. But what is it? How does it work, what is its history, and is it grammatical? Let's find out. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-modif
11:04
Molecular Structure Of Triglycerides (Fats)

518 views / 0 likes - added 8 years ago

Understanding how a triglyceride (triacylglycerol) can be formed from a glycerol molecule and three fatty acids.
06:20
Dashes | Punctuation | Khan Academy

518 views / 0 likes - added 6 years ago

Dashes are like little actors—they can behave like colons, pairs of commas, or parentheses. Learn how to use them in this video! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/introduction-to-the-
03:15
Yellowstone Steaming Acid Pools of Death

515 views / 0 likes - added 5 years ago

TAKE THE PBS DIGITAL SURVEY! https://to.pbs.org/2018YTSurvey Yellowstone National Park’s hot springs have incredible geochemistry thanks to being part of an actual volcano. But why are they so different, and why are some more dangerous than others?
05:00
Women in Chemistry: Heroes of the Periodic Table

514 views / 0 likes - added 5 years ago

To honor women’s history month in the international year of the periodic table, today we wanted to share the story of two of chemistry’s most brilliant and bold women and their paths of elemental discovery -- because what they brought to the table changed
01:51
Possession for words ending in “s” | The Apostrophe | Punctuation | Khan Academy

512 views / 0 likes - added 6 years ago

Do words that end in "s" still need _'s_ to show possession? David and Paige explain! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-apostrophe/e/introduction-to-the-possessive-case Watch the next lesson: https://www.kha
07:49
Palladium - Periodic Table Of Videos

510 views / 0 likes - added 9 years ago

For our updated Palladium video, we are mining the Royal Society archives for the story of its discovery - a tale of money, an asteroid and stolen samples? The discovery was made by William Hyde Wollaston. Royal Society (Romantic Chemistry Exhibition unti
05:50
Blasting the middle from a coin - Periodic Table of Videos

510 views / 0 likes - added 6 years ago

A phosphorus explosion blows the centre from a £1 coin. More links and info in full description ↓↓↓ The £5 bank note in acid: https://youtu.be/wMwThGTYT2o More slow motion experiments: http://bit.ly/chemslomo White Phosphorus: https://youtu.be/U6_-EUcswSc
07:48
Organic Chemistry Naming Examples 4

506 views / 0 likes - added 9 years ago

Organic Chemistry Naming Examples 4
05:56
Contains Loud Bangs - Periodic Table Of Videos

505 views / 0 likes - added 9 years ago

It's detonation vs deflagration. More slow motion at http://bit.ly/chemslomo More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos From the Scho
10:26
Organic Chemistry Naming Examples 2

502 views / 0 likes - added 9 years ago

Organic Chemistry Naming Examples 2 More free lessons at: http://www.khanacademy.org/video?v=CJRQ8gOjq4E
09:37
Ideal Circuit Elements And Sources

501 views / 0 likes - added 8 years ago

Circuit Analysis | Electrical engineering | Khan Academy
05:01
Better Pancakes Through Chemistry

498 views / 0 likes - added 6 years ago

Subscribe! http://bit.ly/ACSReactions Everyone seems to swear by a different pancake recipe. How can you griddle up the perfect pancakes for your Saturday morning breakfast? Find us on all these places: Subscribe! http://bit.ly/ACSReactions Facebook! http
Featured
08:11
Organic Chemistry Naming Examples 3

496 views / 0 likes - added 9 years ago

Organic Chemistry Naming Examples 3 More free lessons at: http://www.khanacademy.org/video?v=Se-ekDNhCDk
03:48
Recognizing fragments | Syntax | Khan Academy

496 views / 0 likes - added 6 years ago

A sentence fragment is a chunk of language that hasn’t made it all the way to being a working sentence; it might be missing a verb, or there might not be a subject. Learn how to turn a fragment into a sentence in this video! Practice this yourself on Khan
06:52
2015 AP chemistry free response 5a

494 views / 0 likes - added 6 years ago

Finding the order of reaction for kinetics of bleaching food coloring. An alternative method of solving 2015 AP Chemistry free response 5a.
17:49
pH of a Weak Acid

486 views / 0 likes - added 9 years ago

Calculating the pH of a weak acid More free lessons at: http://www.khanacademy.org/video?v=dencuBNp_Ck

>> View conjugate acid- pairs | acids bases | chemistry | khan academy web videos