CHE 101 Lecture Notes - Lecture 3: Royal Aircraft Factory F.E.2, Sulfur Dioxide, Sodium Chloride
7 Dec 2017
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Stoichiometry: mole concept, empirical formulas, molecular formula, balanced chemical equations, calculations from balanced chemical equations. P2 will be covered by quiz 1 and exam 1. # of items (mass) buy things in items and mass: mole concept (fig. Atoms are small and difficult to count; the mole is a convenient laboratory-scale number of particles. Definition a mole is the amount of substance that contains as many elementary entities (atoms, molecules, ions, etc. ) as there are atoms in exactly 12 g of 12c. 12 g of 12c has 6. 022 1023 atoms of 12c. 1 mole of o2 has 6. 022 1023 molecules of oxygen. 1 mole of h2o has 6. 022 1023 molecules of water. Note that the mole is also defined by relation to mass. 1 mole of 12c = 12 g of 12c. 1 mole of a compound equals the mass of the compound in grams equal to the molecular mass.
