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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!.
Best Answer: Molar mass is calculated by adding up all the weights of the elements together in a compound. Such as, Aluminum has an atomic weight of 26.98. The funny thing about chemistry, one mole (6.022 x 10*23) of any compound, element, etc is the same as it's atomic weight.