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Molar mass nitrogen ( N2 ) = 28.02 g/mol. 1 mol N2 -------> 28.02 g. 4.60 mol ---------> x g. x = 4.60 * 28.02. x = 129 g of N2. hope this helps!.
Molar mass is the mass per mole of a substance. The units of molar mass are gmol -1. For the atoms of an element the molar mass is simply the relative atomic mass g mol -1.