Question

this is urgent
mass of 0.5 mole of nitrogen molecule
(atomic masses : c=12u,na=23u,n=14u,o=16u)

Answer 1

1 mole N2 = 28 gm
0.5 mole N2 =

$\frac{28}{1} \times 0.5$
=14gm

Answer 2

mole = mass/ amu
mass= mole× amu
=0.5× 14
= 7