Using Molar Mass as a Conversion Factor.  A molar mass is the mass in grams of one mole of a substance.  One mole of any substance contains Avogadro’s.

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Using Molar Mass as a Conversion Factor

 A molar mass is the mass in grams of one mole of a substance.  One mole of any substance contains Avogadro’s number of particles.  x particles.  Calculated by adding together the masses of all of the individual atoms in a chemical formula.  Units are grams per mole (g/mol).  Example – KClO 3  K = 39.10g x 1 atom= 39.10g  Cl =35.45g x 1 atom= 35.45g  O =16.00g x 3 atoms = 48.00g  = g KClO 3

 Complete practice problems.  Solutions:  H 2 SO 4 = g  Ca(NO 3 ) 2 = g  PO 4 3- = g  MgCl 2 = g  Na 2 SO 3 = g  HClO 3 = g  MnO 4 - = g  C 2 H 6 O = g

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