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Organic Chemistry


A series of free online Organic Chemistry videos presented by Khan Academy.

Related Topics:
Chemistry Lessons
High School Chemistry

Sn2 Reactions

Sn1 reaction: Mechanism | Substitution and elimination reactions




Steric hindrance | Substitution and elimination reactions

Steric hindrance and how it affects whether a molecule will participate in an Sn2 reaction.

Sn2 Stereochemistry



Try out our new and fun Fraction Concoction Game.

Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

Fraction Concoction Game


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