Chemistry & Biochemistry

140 video lectures: Atomic Structure and Molecules | Kinetic Molecular Theory and Chemical Reactions | Thermodynamics | Calorimetry and Colligative Properties | Solutions, Solvents | Acid and Base Reactions | Electrochemistry

312 Lectures: Oribtals and Bonding | Alkanes | Alkenes | Stereochemistry | Ring Structures | Alcohols, Amines | Substution and Elimination | Equilibrium and Reaction Rates | Spectroscopy | and much much more.

Stoichiometry; moles; grams; percent yield; density / by Chem Help ASAP

ChemSpider is a free chemical structure database providing fast text and structure search access to more than 29 million structures from hundreds of data sources.

The Royal Society of Chemistry's interactive periodic table features history, alchemy, podcasts, videos and data trends across the periodic table.