Question

What is the formula mass of ammonium carbonate (`(NH_4)_2CO_3`)?

Answer 1

Take the atomic masses from the Periodic Table, and add them up.

Explanation:

I'll give you a start: `(NH_4)_2CO_3`. There are 2 nitrogen atoms, whose formula mass is 14 g, and 8 hydrogen atoms whose formula mass is 1:

`2xx14+8xx1................=??`