Question

The formula for the chemical compound magnesium sulphate is MgSO4. How do you calculate the relative formula mass (M) of this compound?

Answer 1

relative formula mass is sum of atomic masses of elements present in the compound.

atomic masse of Mg=24,S=32,O=16

relative formula mass=mass×atomicity.

relative formula mass=24(1)+32(1)+16(4)

relative formula mass=24+32+64=120g

hope it will help you.