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: Finding units of rate constant k
How to find the units for the rate constant k for a zero, first, or second order reaction. Chemistry Did you know that everything is made o…
VideoFree5 minutes
check_box_outline_blank
Organic chemistry: Formal charge on nitrogen
How to calculate the formal charge on nitrogen Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basi…
VideoFree9 minutes
check_box_outline_blank
Cosmology and astronomy: Seasons aren't dictated by closeness to sun
Why our closeness to the sun does not dictate the seasons Cosmology and astronomy It's a great, big universe out there. In this section of …
VideoFree5 minutes
check_box_outline_blank
Health and medicine: Hypertension and blood vessel damage
Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-p…
VideoFree5 minutes
check_box_outline_blank
Organic chemistry: Aromatic stability IV
Aromaticity of the cyclopentadienyl anion and cycloheptatrienyl cation. Organic chemistry Sal and Jay cover topics covered in college organ…
VideoFree11 minutes
check_box_outline_blank
Cosmology and astronomy: Supernova clarification
Supernova clarification Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, you'll learn about t…
VideoFree2 minutes
check_box_outline_blank
Organic chemistry: Diels-Alder: stereochemistry of dienophile
How to analyze the stereochemistry of the dienophile in a Diels-Alder reaction Organic chemistry Sal and Jay cover topics covered in colleg…
VideoFree9 minutes
check_box_outline_blank
Chemistry: Balancing chemical equation with substitution
Using the substitution method to balance a reaction where a reactant and product have a polyatomic ion in common. Chemistry Did you know th…
VideoFree4 minutes
check_box_outline_blank
Organic chemistry: Newman projection practice 1
How to use Newman projections to determine the most and least stable conformations of a compound Organic chemistry Sal and Jay cover topics…
VideoFree14 minutes
check_box_outline_blank
Chemistry: Oxidation and reduction
Introducing oxidation states, oxidation, and reduction. Some tips for remembering oxidation and reduction. Chemistry Did you know that ever…
VideoFree11 minutes
check_box_outline_blank
Organic chemistry: Mixed (crossed) aldol condensation
How to find the product of a mixed (crossed) aldol condensation. Organic chemistry Sal and Jay cover topics covered in college organic chem…
VideoFree9 minutes
check_box_outline_blank
Health and medicine: Hyperplasia in colon tissue
Dr. Andy Connolly from Stanford Medical School shows Sal what hyperplasia in colon tissue looks like Health and medicine The medical world …
VideoFree5 minutes
check_box_outline_blank
Biology: Meiosis: Where the sex starts
Hank gets down to the nitty gritty about meiosis, the special type of cell division that is necessary for sexual reproduction in eukaryotic…
VideoFree11 minutes
check_box_outline_blank
Chemistry: Weak base equilibrium
Quick overview of Kb and pKb. Examples of calculating the pH of a weak base solution. Chemistry Did you know that everything is made out of…
VideoFree11 minutes
check_box_outline_blank
Chemistry: Covalent networks, metallic crystals, and ionic crystals
Covalent networks, metallic crystals, and ionic crystals: Some of the strongest molecular structures. Chemistry Did you know that everythin…
VideoFree9 minutes