Question

Rohan found out that the ratio of nitrogen to hydrogen particles in a sample of ammonia from his lab was 1:3, by mass. Next day he collected an ammonia sample from a different lab. Which of the following will be the ratio of nitrogen to hydrogen particles in this sample?

• A. 1:2
• B. 1:3
• C. 1:1
• D. 1:4

Answer 1

The correct option is B 1:3

According to the law of constant proportions any compound is made up of elements in a definite proportion by mass. Also, this proportion does not depend on the source of the compound.

Hence, a sample of ammonia $\left(N{H}_3\right)$ collected from any source will have the ratio of nitrogen to hydrogen particles as 1:3, by mass.