# What is the gram formula mass of Al_2(SO_4)_3?

##### 1 Answer
Dec 18, 2016

$A {l}_{2} {\left(S {O}_{4}\right)}_{3}$ = $342.151 \cdot g \cdot m o {l}^{-} 1$

#### Explanation:

Use the periodic table to add the weights of all the constituent atoms about the species.

Remember that the formula mass is the calculated mass of one mol of the substance.