# What is the number of grams in 7.19 moles of #BaSO_4#?

##### 1 Answer

7.19 moles

#### Explanation:

Assume:

n = number of moles

m = mass of substance

M = molar mass

7.19 moles has been provided for you

Your next step is to find the molar mass (M) of

Unsure what is molar mass? Molar mass is equivalent to the atomic weight on the periodic table.

Your first step in finding molar mass is to find out what elements are present in

If you refer to your periodic table, the molar mass of Barium is 137 g/mol, Sulfur 32.1 g/mol, and Oxygen 16.0 g/mol.

Since there are 4 oxygens present, you need to times the molar mass of oxygen (O) by 4.

Therefore the molar mass of

[

You've now found the molar mass.

Since you found the number of moles and molar mass, your final step is to find the mass of

The mass of

[233.1 g/mol