CM-UY 1004 Lecture Notes - Lecture 8: Heat Capacity, Molecular Mass, Chemical Formula
2 Sep 2016
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Mole: 6. 02 x 1023 of something (this is avogadro"s number) A mole of atoms of a certain element weighs as much as the gram formula mass. Converting grams to moles: mole = number of grams. Converting moles to grams: mole = number of moles. Coefficients in chemical equations show the mole ratio of the reactants and products. In equations with gasses, you can use the ratio of moles as the ratio of gasses and find unknown volumes. If you know the gram formula mass of the molecular formula, then you can find it from the molecular formula. You divide the molecular formula mass by the empirical formula mass, and then multiply the empirical formula by that factor: physical behavior of matter. Solids: matter that is held in rigid form (the particles are very close together) definite shape + volume. Liquids: particles are not held together as rigidly as solids (mobility of particles leads to indefinite shape, but definite volume)
