Today's Crash Course Chemistry takes a historical perspective on the creation of the science, which didn't really exist until a super-smart, super-wealthy Frenchman put the puzzle pieces together - Hank tells the story of how we went from alchemists to chemists, who understood the law of conservation of mass as proposed by a decapitated aristocrat, and explains how we came to have a greater understanding of how chemical compounds work and eventually a complete understanding of what atoms and molecules are. Like Crash Course? www.facebook.com/YouTubeCrashCourse Follow Crash Course! www.twitter.com/TheCrashCourse Table of Contents Alchemists to Chemists 01:07 Law of Conservation of Mass 03:25 Decapitated Aristocrat 04:11 Chemical Compounds 05:44 Atoms and Molecules 06:07:1 Support CrashCourse on Subbable: subbable.com/crashcourse