Question

7. You have 5 moles of Al2(SO4)3. How many grams are present?

Answer 1

1) List the known and unknown quantities.

Sample: 5 mol Al2(SO4)3

Sample mass: unknown.

2) Convert moles of Al2(SO4)3 to grams of Al2(SO4)3.

The molar mass of Al2(SO4)3 is 342.1509 g/mol.

$g\text{ }Al_2(SO_4)_3=5\text{ }mol\text{ }Al_2(SO_4)_2*\frac{342.1509\text{ }g\text{ }Al_2(SO_4)_2}{1\text{ }mol\text{ }Al_2(SO_4)_2}=1710.8\text{ }g\text{ }Al_2(SO_4)_2$

5 mol Al2(SO4)3 is equal to 1710.8 g Al2(SO4)3.