(i) chemical formulae of Magnesium chloride =\( MgCl_2 \)
(ii) chemical formulae of Calcium oxide = \(CaO\)
(iii) chemical formulae of Copper nitrate = \(Cu(NO_3)_2 \)
(iv) chemical formulae of Aluminium Chloride = \(AICI_3\)
(v) chemical formulae of Calcium carbonate = \(CaCO_3 \)