Molar Mass. Molecular Weight and Molar Mass Molecular weight Molecular weight is the sum of atomic weights of all atoms in the molecule. Molar mass Molar.

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Presentation transcript:

Molar Mass

Molecular Weight and Molar Mass Molecular weight Molecular weight is the sum of atomic weights of all atoms in the molecule. Molar mass Molar mass = molecular weight in grams. example: NaCl has a molecular weight of 58.5 a.m.u. example: NaCl has a molar mass of 58.5 grams this is composed of a single molecule of NaCl this is composed of a 6.02 x10 23 molecules of NaCl

The Molar Mass and Number of Particles in One-Mole Quantities SubstanceMolar MassNumber of Particles in One Mole Carbon (C) 12.0 g 6.02 x C atoms Sodium (Na) 23.0 g 6.02 x Na atoms Iron (Fe) 55.9 g 6.02 x Fe atoms NaF (preventative 42.0 g 6.02 x NaF formula units for dental cavities) CaCO 3 (antacid) g 6.02 x CaCO 3 formula units C 6 H 12 O 6 (glucose) g 6.02 x glucose molecules C 8 H 10 N 4 O 2 (caffeine) g 6.02 x caffeine molecules

Chemical Equations

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