PV=nRT. There is probably at least one vanity license plate in every state with some version of the Ideal Gas Law on it. You can guess the driver of that car is one clever chemist. Mastering this important law will make you clever too.
Dewitt on the Ideal Gas Law: http://youtu.be/WhP6zJbSxec
Where did R come from? http://youtu.be/kBgzzwCTddc
Crash Course on Ideal Gases: http://youtu.be/BxUS1K7xu30