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 …
check_box_outline_blank
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
check_box_outline_blank
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
check_box_outline_blank
Biology: Hydrogen bonding in water
Hydrogen bonding in water. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology …
VideoFree7 minutes
check_box_outline_blank
Biology: Cancer
An introduction to what cancer is and how it is the by-product of broken DNA replication. Biology Life is beautiful! From atoms to cells, f…
VideoFree13 minutes
check_box_outline_blank
Organic chemistry: Monosubstituted cyclohexane
How to draw and analyze the two chair conformations for a monosubstituted cyclohexane Organic chemistry Sal and Jay cover topics covered in…
VideoFree8 minutes
check_box_outline_blank
Biology: Demystifying ocean acidification and biodiversity impacts
Why rising carbon dioxide levels in the atmosphere affect the acidity of the ocean, and what the consequences are for marine life. Video by…
VideoFree12 minutes
check_box_outline_blank
Organic chemistry: Formal charge on oxygen
How to calculate the formal charge on oxygen Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic …
VideoFree10 minutes
check_box_outline_blank
Chemistry: Plotting data for a second-order reaction
Example of graphing second order rate data to see a linear relationship, and calculating rate constant k from the slope. Chemistry Did you …
VideoFree8 minutes
check_box_outline_blank
Chemistry: Electron affinity: period trend
Electron affinity is the change in energy when a neutral atom in its gaseous form gains an electron to form a negative ion. For example, wh…
VideoFree13 minutes
check_box_outline_blank
Chemistry: Redox titration
A redox titration example: titrating an Fe(II) solution with potassium permanganate. Chemistry Did you know that everything is made out of …
VideoFree8 minutes
check_box_outline_blank
Biology: Isomers
Structural isomers, stereoisomers, geometric isomers, cis-trans isomers, and enantiomers. Biology Life is beautiful! From atoms to cells, f…
VideoFree7 minutes
check_box_outline_blank
Chemistry: Spectrophotometry introduction
Spectrophotometry, transmittance, absorbance and the Beer-Lambert Law Chemistry Did you know that everything is made out of chemicals? Chem…
VideoFree13 minutes
check_box_outline_blank
Chemistry: Solubility and intermolecular forces
Solubility of salt and gas solutes in liquid solvent. Chemistry Did you know that everything is made out of chemicals? Chemistry is the stu…
VideoFree13 minutes
check_box_outline_blank
Biology: Evolution: It's a Thing
Hank gets real with us in a discussion of evolution - it's a thing, not a debate. Gene distribution changes over time, across successive ge…
VideoFree11 minutes
check_box_outline_blank
Biology: Natural Selection
Hank guides us through the process of natural selection, the key mechanism of evolution. Biology Life is beautiful! From atoms to cells, fr…
VideoFree12 minutes