# What is the number of atoms or ions of hydrogen in (NH_4)_2CO_3?

Apr 5, 2016

$8 H$

#### Explanation:

The only hydrogen in the compound above,

${\left(N {H}_{4}\right)}_{2} C {O}_{3}$

is in the ${\left(N {H}_{4}\right)}_{2}$ section. You can ignore the $C {O}_{3}$.

${\left(N {H}_{4}\right)}_{2}$ means there are 2 $N {H}_{4}$ groups.

$N {H}_{4}$ has a total of one nitrogen and four hydrogen atoms, which you tell from the subscript (small numbers). If there are no numbers, assume it is a $1$.

Since there are two of these $N {H}_{4}$ groups, and one has four hydrogen, then two must have $8$.