home | index | units | counting | geometry | algebra | trigonometry & functions | calculus analysis | sets & logic | number theory | recreational | misc | nomenclature & history | physics Final Answers © 2000-2019 GĂ©rard P. Michon , Ph.D. Basic Chemistry Willard Libby came to Princeton with a little jar of crystals of barium xenate . Freeman Dyson (1923-) Measuring chemical stuff in moles (mol) makes stoichiometry obvious. Modern distillation ( alembic = still-head) is due to Mary the Jewess . The retort was a prominent tool of alchemists and chemists for centuries. Production and distillation of alcohol . Its origins and limitations. Black powder : An ancient explosive, still used as a propellant ( gunpowder ). Predicting explosive reactions : A useful but oversimplified rule of thumb. Thermite ...