Question

in ammonia , the proportion of nitrogen and hydrogen by mass is
a) 1 : 8
b) 3:8
c) 14:3
d) 14:5

Answer 1

c) is the correct.

formula for ammonia is NH3

mass of nitrogen is 14
& mass of hydrogen is 1

in NH3=N:H3
=14:1×3
=14:3

Answer 2

the correct answer is 14:3