# How many moles are there in 397 grams of #Na_2SO_4#?

##### 2 Answers

2.80

#### Explanation:

A mole is a unit-molecular weight (grams/mole in this case) of an Avogadro's number of molecules or atoms. It is calculated for a molecule by adding up the individual atomic weights of its constituent atoms.

For

#### Explanation:

Molar mass of

Use the equation,

where,