If the atomic weight of nitrogen is 14.0, what is the mass of one mole of nitrogen gas ##N_2##?

The mass of one mole (molar mass) of nitrogen gas ##("N"_2")## is ##"28.0 g/mol"##.

The molar mass of an element is its relative (atomic weight) on in g/mol. The molar mass of the element nitrogen is ##"14.0 g/mol"##. In order to determine the molar mass of nitrogen gas ##("N"_2")##, multiply the molar mass of the element nitrogen times two.

Molar mass of nitrogen gas ##("N"_2")####=14.0"g/mol"xx2####=####28.0"g/mol"##