# How would you find out how many atoms are in a compound?

May 30, 2017

See below

#### Explanation:

There are 2 Oxygen atoms (the subscript), and 1 Nitrogen atom. So yes, in total there are 3 atoms.

If it was like

$3 N {O}_{3}$

then there'll be 3 Nitrogen atoms and 9 Oxygen atoms.