Write the formulae of compounds with the following information and the names of the molecules.
(a) 2 phosphorus atoms, 5 oxygen atoms.
(b) 1 calcium atom, 2 oxygen atoms, 2 hydrogen atoms.
(c ) 1 iron atom, 1 sulphur atom, 4 oxygen atoms.
(d) 1 potassium atom, 1 chlorine atom, 3 oxygen atoms.
(e) 3 sodium atoms, 1 phosphorus atom, 4 oxygen atoms.

Explanation

(a) `P_(2)O_(5)` implies Phosphorus pentoxide
(b) `Ca(OH)_(2)` implies Calcium hydroxie
(c ) `FeSO_(4)` implies Ferrous sulphate
(d) `KClO_(3)` implies Potassium chlorate
(e) `Na_(3)PO_(4)` implies Sodium phosphate