Question

How many nitrogen atoms are present in a sample of 1,983 hydrogen atoms, if ammonia is a compound consisting of a 1:3 ratio of nitrogen and hydrogen atoms?

Answer 1

The answer is `661` atoms of `N`.

Since ammonia (`NH_3`) has a `1:3` ratio of Nitrogen to Hydron atoms, and since the number of `H` atoms is 1983, the number of `N` atoms is

`1983` `H` `at oms` `* (1 at om N)/(3 at oms H) = 661` atoms `N`.