# What is the molar mass of H_3PO_4?

##### 1 Answer
Mar 31, 2016

$97.995 g / m o l$

#### Explanation:

You need to add the atomic masses of the molecule:

$M \left({H}_{3} P {O}_{4}\right) = 3 \times M \left(H\right) + M \left(P\right) + 4 \times M \left(O\right)$

$= 3 \times 1.008 + 30.9738 + 4 \times 15.9994 = 97.995 g / m o l$