The mass of a hydrogen atom is
1.67 × 10 grams.
-24
The mass of a nitrogen atom is
2.32 × 107 grams.
- 23
A molecule of ammonia contains 3 atoms of
hydrogen and 1 atom of nitrogen.
a) Calculate the mass of one molecule of
ammonia
Give your answer in standard form.
b) Calculate the number of molecules in 1
gram of ammonia.
Give your answer in standard form to 3
significant figures.
