CHEM 1A Lecture Notes - Lecture 1: Molar Mass, Paper Towel, Green Chemistry
Document Summary
Atomic structure periodic table chemical bonding. Chemical reactions go to lower free energy. Links between chemistry and societal issues: old energy, new energy, green chemistry, useful materials. This week"s lecture content: brief review of fundamentals. Get started with http://saplinglearning. com: from atoms to molecules: building blocks of chemistry. Dalton (1807) deduced atomic theory from mass rations (we will learn quantum theory of atoms in weeks 2 and. Molecules are collections of atoms stabilized by chemical bonding (we will learn about ionic, covalent bonding, shape, mo"s in weeks 4 to 6) Microscopic, macroscopic, atoms or molecules, mass, moles (mol), grams (g) 1 mole = 6. 022137 x 1023 = na = avagadro"s number = g. Eg 1 mole of h2o is na water molecules. M = mn: m mass, m proportionality constant is molar mass (g/mol, n moles. What about gases: 1 mol of gas occupies 22. 4l at stp, 55 mol of gas is over 1000 l.
