Question

How many molecules are in 219 g of magnesium chloride?

Answer 1

`1.38 * 10^(24)`

Step-by-step explanation:

The formula mass of magnesium chloride is 95.21 g/mol.

This means 219 grams is equal to
`(219)/(95.21)` moles.

Multiplying this by Avogadro's number, there are
`(219)/(95.21)(6.02 * 10^(23))=1.38 * 10^(24)` molecules.