Sixty multiple-choice chemistry questions make up this comprehensive exam used for the 2001 US National Chemistry Olympiad. Every topic that you would expect to approach in a general chemistry class is queried on. You could easily use...

The National Chemistry Olympiad exams are comprehensive tests covering an entire  year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your...

This simulation explores the "limiting reactant" effect. The extent to which reactants that involve more than one reactant can produce products depends on the quantities of those reactants combined. In most cases, one reactant will be...

Textbook-style practice limiting reagent exercises with that can be used as a way to "predict and check" your answers using the virtual lab.

A multiple-choice quiz on the processes of respiration and photosynthesis in plants.