## What is the percentage composition by mass of nitrogen in ammonia?

Answer 1:

\(\text { Well it is simply } \frac{\text { Mass of nitrogen }}{\text { Mass of nitrogen and hydrogen }} \times 100 \%\)

Explanation:

And thus taking molar masses……we get:

\(\cong 80 \%\).

Answer 2:

The mass percent of \(N\) in \(\mathrm{NH}_{3}\) is \(82.244 \%\).

Explanation:

Divide the mass of \(N\) by the mass of \(\mathrm{NH}_{3},\) then multiply by \(100\)

The chemical formula for ammonia is \(\mathrm{NH}_{3}\). The formula indicates that in each mole of \(\mathrm{NH}_{3}\), there is one mole of

\(N\) atoms.

The molar mass of ammonia is \(17.031 \mathrm{~g} / \mathrm{mol}\). The molar mass of \(N\) is \(14.007 \mathrm{~g} / \mathrm{mol}\).