Grams and Moles of a Compound

For elements, the molar mass is the mass of 1 mol of atoms of that element. For compoxmds, the molar mass is the mass of 1 mol of molecules or formula units of that compoxmd. The molar mass of a compormd in grams per mole is numerically equal to the formula mass of the compormd in atomic mass units. For example, the formula mass of CO2 is  

Formula mass = 1 (Atomic mass of C) -1- 2(Atomic mass of O) 

Just as the molar mass of an element serves as a conversion factor between grams and moles of that element, the molar mass of a compound serves as a conversion 

We then strategize by drawing a solution map which shows how the molar mass converts grams of the compound to moles of the compoimd. 

EXAMPLE 6.4 The Mole Concept—Converting between Grams and Moles for Compounds 

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