A compound contains 28% of nitrogen and 72% of a metal by weight. 3 atoms of the metal combine with 2 atoms of nitrogen. Find the atomic weight of the metal. (N = 14)

A compound contains 28% of nitrogen and 72% of a metal by weight. 3 at

1.	A compound contains 28% of nitrogen and 72% of a metal by weight. 3 atoms of the metal combine with 2 atoms of nitrogen. Find the atomic weight of the metal. (N = 14)
Answer» Solution :The formula of the compound is `M_(2)N_(2)` (M representing the metal) `2 xx `moles of `M= 3 xx` moles of N. Now if the WEIGHT of the compound is 1 gram then weight of M = 0.72 G and weight of N=0-28 g. `:. 2XX(0.72)/("atomic weight of M") =3xx(0.28)/(14)` . Atomic weight of the metal =24