Question

How many moles of MgCl2 are there in 323 g of the compound?

Answer 1

A mole is defined as the mass of substance containing the same number of fundamental units as the are atoms in carbon 12. The equation of finding the mole is
`n=(m)/(M)`, where n is number of moles, m is mass of
`MgCl_2` and M is the relative formula mass of
`MgCl_2`

The formula mass of
`MgCl_2` is 95.11 g/mol

So
`n=(m)/(M) = (323g)/(95.11g/mol)= 3.40mol`.