Question

calculate the mass pf 0.5 mole of N2 gas

Answer 1

Molar mass of N2 = 2 x 14. = 28 amu. Therefore, mass of one mole of N2 gas = 28 amu. Mass of 0.5 mole of N2 gas = 28 x 0.5. = 14amu

Answer 2

Hi friend,
Nitrogen gas is n2
molecular mass of N2 is 28g
1 mole weighs 28g
0.5 moles weigh 14g