Question

Calculate the mass (in g) of 5.86x10^20 SO3 molecules.

Answer 1

0.0779 g SO₃

Procedure

To solve this question, you will need to use the Avogadro's number equivalent to 6.02214 x 10^23 molecules/ mol, and then the molecular weight in grams per mole for the SO₃.

`5.86*10^(20)\text{ molecules SO}_3\frac{1\text{ mol SO}_3}{6.02214\text{ x 10}^(23)\text{molecules SO}_3}\frac{80.06\text{ g SO}_3}{1\text{ mol SO}_3}=0.0779\text{ g SO}_3`