Khan Academy: 2757 producten
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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Health and medicine: Molarity vs. molality
Learn how molarity and molality differ! Rishi is a pediatric infectious disease physician and works at Khan Academy. Health and medicine Th…
VideoGratis8 minuten
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High school biology: Can we clone extinct dinosaurs from DNA preserved in their fossils?
Paleontologists and molecular biologists have searched for a couple of decades to find and replicate DNA from some non-avian dinosaur fossi…
VideoGratis1
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Chemistry: Oxidation and reduction
Introducing oxidation states, oxidation, and reduction. Some tips for remembering oxidation and reduction. Chemistry Did you know that ever…
VideoGratis11 minuten
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Biology: Trp operon
The trp operon is a well-studied operon when it comes to gene regulation. It is involved in the biosynthesis of the amino acid tryptophan. …
VideoGratis7 minuten
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Chemistry: Oxidation state trends in periodic table
Trends in common oxidation states for main group elements. Chemistry Did you know that everything is made out of chemicals? Chemistry is th…
VideoGratis9 minuten
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Organic chemistry: Preparation of alcohols using NaBH4
How to prepare a primary or secondary alcohol from a ketone or aldehyde using sodium borohydride. Organic chemistry Sal and Jay cover topic…
VideoGratis13 minuten
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Organic chemistry: Meta directors I
Regiochemistry. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of basic high s…
VideoGratis11 minuten
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Chemistry: Balancing chemical equations
How to balance a chemical reaction by making sure you have the same number of atoms of each element on both sides. Chemistry Did you know t…
VideoGratis5 minuten
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Health and medicine: Pulmonary hypertension diagnosis Swan Ganz catheterization
Health and medicine The medical world can be a confusing place. Patients, their families, and even students entering health fields might fe…
VideoGratis3 minuten
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Organic chemistry: Naming simple alkanes
Naming simple linear and cyclic alkanes Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic under…
VideoGratis9 minuten
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Chemistry: The mole and Avogadro's number
Introduction to the idea of a mole as a number (vs. an animal) Chemistry Did you know that everything is made out of chemicals? Chemistry i…
VideoGratis10 minuten
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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…
VideoGratis11 minuten
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Organic chemistry: Hydrogenation
Hydrogenation of an alkene using hydrogen gas and a platinum (or palladium or nickel) catalyst. The mechanism of syn addition of the hydrog…
VideoGratis12 minuten
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Chemistry: Acid base titration example
Using acid-base titration to find mass of oxalic acid, a weak acid. Chemistry Did you know that everything is made out of chemicals? Chemis…
VideoGratis13 minuten
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Chemistry: Stoichiometry example problem 2
Calculating mass of oxygen needed and grams of product formed from the combustion of 25.0 g of glucose. Chemistry Did you know that everyth…
VideoGratis19 minuten