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: Small x approximation for large Kc
Guidelines and worked examples for using the small x approximation to solve equilibrium problems with large Kc values Chemistry Did you kno…
VideoFree14 minutes
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Organic chemistry: Chiral examples 1
Chiral examples 1 Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of basic high…
VideoFree11 minutes
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Biology: Species
What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs. Biology Life is beautiful! From atoms to cells, from genes to protei…
VideoFree9 minutes
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Organic chemistry: Elimination vs substitution: primary substrate
Figuring out if a primary substrate will undergo substitution or elimination. Organic chemistry Sal and Jay cover topics covered in college…
VideoFree7 minutes
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Biology: Overview of protein structure
Primary, secondary, tertiary and quaternary protein structure. Beta pleated sheets and alpha helices. Biology Life is beautiful! From atoms…
VideoFree10 minutes
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Chemistry: Hess's law example
Hess's law example Chemistry Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, prop…
VideoFree12 minutes
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Organic chemistry: Optical activity
How optically active compounds rotate plane polarized light Organic chemistry Sal and Jay cover topics covered in college organic chemistry…
VideoFree9 minutes
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Chemistry: Spectrophotometry example
Spectrophotometry Example - determining concentration based on absorbance Chemistry Did you know that everything is made out of chemicals? …
VideoFree13 minutes
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Chemistry: Disproportionation
Assigning oxidation states for the decomposition of hydrogen peroxide, a disproportionation reaction. Chemistry Did you know that everythin…
VideoFree5 minutes
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Organic chemistry: Organic acid-base mechanisms
How to use curved arrows to draw mechanisms for organic acid-base reactions Organic chemistry Sal and Jay cover topics covered in college o…
VideoFree6 minutes
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Biology: Saltatory conduction in neurons
Myelin sheaths, nodes of Ranvier, and saltatory conduction in neurons. Biology Life is beautiful! From atoms to cells, from genes to protei…
VideoFree11 minutes
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Biology: Zygote differentiating into somatic and germ cells
Learn how a zygote, the single cell produced by fertilization, divides by mitosis to produce all the tissues of the human body (including g…
VideoFree10 minutes
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Chemistry: Mechanisms and the rate-determining step
An introduction to mechanisms and the rate determining step. Example of finding rate law of multistep reaction with initial slow step. Chem…
VideoFree9 minutes
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Chemistry: 2015 AP Chemistry free response 2a (part 1 of 2)
Moles of ethene produced from dehydration reaction with ethanol. From 2015 AP Chemistry free response 2a, part 1 of 2. Chemistry Did you kn…
VideoFree11 minutes
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Biology: The hydrologic and carbon cycles: Always recycle!
Hank explains how carbon and water are recycled through ecosystems and the biosphere. Biology Life is beautiful! From atoms to cells, from …
VideoFree9 minutes