Write the formulae for the following compounds: 

(a) Mercury(II) chloride               (b) Nickel(II) sulphate 

(c) Tin(IV) oxide                          (d) Thallium(I) sulphate 

(e) Iron(III) sulphate                    (f) Chromium(III) oxide

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1 Answers

(a) Mercury (II) chloride: HgCl2 

(b) Nickel (II) sulphate: NiSO4 

(c) Tin (IV) oxide: SnO2 

(d) Thallium (I) sulphate: Tl2SO

(e) Iron (III) sulphate: Fe2(SO4)

(f) Chromium (III) oxide: Cr2O

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