Question

Calculate the molar mass of Iron (II) Sulphate. [Fe = 56 u, S = 32 u, 0 = 16 u​

Answer 1

Answer:

Molecular weight of FeS

2

=56+2(32)=120 g/mol.

One mole (120 g) of FeS

2

will contain 2×32=64 g of S

30 g of FeS

2

will contain

120

30

×64=16 g of S.

Hence, the mass of sulfur contained in 30 grams of pyrites is 16 g.