# How would you calculate the percent composition of nitric acid HNO_3?

Apr 7, 2017

Find the total mass of the nitric acid $H N {O}_{3}$ Then divide the mass of each atom by the total mass to find the percentage.

#### Explanation:

$H = 1 \times 1 = 1 g$
$N = 1 \times 14 = 14 g$
$O = 3 \times 16 = 48 g$

$1 + 14 + 48 = 63 g$

 % H = 1/63

 1/63 = 1.5% H

 % N = 14/63

14/63 = 22% N

 % O = 48/63

# 48/63 = 76% O