Question

Write the molecular formula of the following compounds of Iron (II) sulphide and.

Find the number and names of elements present in them and calculate their molecular masses.

Answer 1

Iron (II) sulphide

1. A molecule of iron (II) sulphide is represented by the formula FeS.
2. The elements present in it are iron and sulphur.
3. One molecule of iron (II) sulphide has one atom of iron and one atom of sulphur.
4. Molecular mass of iron (II) sulphide (FeS)
   = 55.5 + 32
   = 87.5 amu.