Question

Gram molecular weight of $N{H}_3$ is:

• A. 16
• B. 17
• C. 9
• D. 18

Answer 1

The correct option is B

17

Molecular weight of $N{H}_3$ can be calculated by calculating the weight of one atom of nitrogen and three atoms of hydrogen.
Weight of one N atom = 14

Weight of one H atom = 1

So, it will be: 14 $\times$ (1) + 3 $\times$ (1) = 17 gram.