Question

Calculate the mass 0.5 mole of nitrogen gas mass from mole of molecules

Answer 1

Mass of one mole of nitrogen gas = 28 g
∴ Mass of 0.5 mole of nitrogen gas = 0.5 × 28 g = 14 g

Answer 2

let mass of N2 be x
no. of moles=mass of N2 in grams/molecular mass of N2
0. 5=x/28
x=28×0.5
x=14