# The formula for the chemical compound magnesium sulphate is "MgSO"_4. How do you calculate the relative formula mass (M) of this compound?

Nov 4, 2016

Mass=120g

#### Explanation:

Formula Mass is the sum of masses of Individual atoms in the compound.It is Taken out in case of ionic compounds.

$M g S {O}_{4}$

Mass=mass of Mg +mass of S +4xmass of oxygen

mass=24+32+64
mass=120g