Question

A compound contains 28% nitrogen and 72% metal by mass. 3 atoms of the metal combine with 2 atoms of nitrogen. The atomic mass of metal is (1) 12 (2) 36 (3) 24 (4) 48​

Answer 1

Answer:

Correct option is

24

Three atoms of M combine with 2 atoms of N.

Equivalent weight of N=

3

14

(valency of N in compound = 3)

28g N combines with 72g metal.

3

14

N combines =

28

72

×

3

14

=12

The equivalent weight of metal =12

Atomic mass of metal = equivalent weight × valency=12×2=24.

Hence, option A is correct.