Question

The ratio of the masses of nitrogen and hydrogen present in 1g of ammonia is 143. How many times the
mass of 1 g of hydrogen atoms would nitrogen weigh in 2.5 g of ammonia?

Answer 1

5 times

Explanation:

In ammonia, nitrogen and hydrogen are always present in the ratio 14:3 by mass

Let's assume the mass of a hydrogen atom is X and that of an ammonia atom is Y.

From the law of constant proportion,

3Y: X=2:5 ⇒ X= 5 ×Y

The mass of a hydrogen atom (X) is 5 times that of an ammonia atom (Y).