Question:
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
Solution:
(a) Mercury (II) chloride:
$\mathrm{HgCl}_{2}$
(b) Nickel (II) sulphate:
$\mathrm{NiSO}_{4}$
(c) Tin (IV) oxide:
$\mathrm{SnO}_{2}$
(d) Thallium (I) sulphate:
$\mathrm{Tl}_{2} \mathrm{SO}_{4}$
(e) Iron (III) sulphate:
$\mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}$
(f) Chromium (III) oxide:
$\mathrm{Cr}_{2} \mathrm{O}_{3}$
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