Khan Academy: 2757 products
Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get …
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Chemistry: Forms of the Arrhenius equation
How to write different forms of the Arrhenius equation. Using the Arrhenius equation to look at how changing temperature and activation ene…
VideoFree7 minutes
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Organic chemistry: Oxidation of alcohols I: Mechanism and oxidation states
Oxidation of primary alcohols to aldehydes (and then carboxylic acids); oxidation of secondary alcohols to ketones. Organic chemistry Sal a…
VideoFree13 minutes
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High school biology: Ligaments, tendons, and joints
High school biology The musculoskeletal system Topic: Science Learn about all the sciences, from physics, chemistry and biology, to cosmolo…
VideoFree3 minutes
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Chemistry: Complete ionic and net ionic equations
The difference between molecular equations, complete ionic equations and net ionic equations. How to identify spectator ions. Chemistry Did…
VideoFree6
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Organic chemistry: Keto-enol tautomerization (by Jay)
Mechanisms for acid and base catalyzed keto-enol tautomerization. Organic chemistry Sal and Jay cover topics covered in college organic che…
VideoFree11 minutes
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Organic chemistry: Formation of imines and enamines
How aldehydes and ketones react with primary and secondary amines to for imines and enamines. Organic chemistry Sal and Jay cover topics co…
VideoFree14 minutes
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Biology: Antiparallel structure of DNA strands
DNA is composed of two strands of nucleotides held together by hydrogen bonding. The strands each run from 5' to 3' and run in antiparallel…
VideoFree10 minutes
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Organic chemistry: Ether nomenclature
Rules for naming ethers. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of bas…
VideoFree11 minutes
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Biology: Anatomy of a neuron
Neurons (or nerve cells) are specialized cells that transmit and receive electrical signals in the body. Neurons are composed of three main…
VideoFree6 minutes
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Chemistry: Electron configurations for the first period
Introduces aufbau principle, Pauli exclusion principle, and orbital notation. Writes out the quantum numbers for the electrons in H and He.…
VideoFree6 minutes
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Chemistry: Chilling water problem
How much ice at -10 degrees C is necessary to get 500 g of water down to 0 degrees C? Chemistry Did you know that everything is made out of…
VideoFree11 minutes
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Biology: Circulatory & respiratory systems
Hank takes us on a trip around the body - we follow the circulatory and respiratory systems as they deliver oxygen and remove carbon dioxid…
VideoFree11 minutes
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Cosmology and astronomy: Plate tectonics: Difference between crust and lithosphere
Plate Tectonics Introduction and Difference between crust and lithosphere Cosmology and astronomy It's a great, big universe out there. In …
VideoFree8 minutes
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Organic chemistry: Chemical equivalence
How to predict the number of signals in a proton NMR spectrum based on the number of non-equivalent hydrogens in a compound. Organic chemis…
VideoFree11 minutes
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Organic chemistry: Sn1 vs Sn2: Summary
Summary of Sn1 and Sn2 reactions and the types of molecules and solvents that favor each. Organic chemistry Sal and Jay cover topics covere…
VideoFree14 minutes