(a(i))[2]
Explain what the term relative molecular mass means.
(a(ii))[1]
State the empirical formula for ethanedioic acid.
(a(iii))[3]
Calculate the number of carbon atoms in $0.18\,\text{g}$ of ethanedioic acid, $\mathrm{HO_2CCO_2H}$. Show your working.
(b(i))[2]
Construct an equation for the reaction of $\mathrm{CaC_2O_4}$ on heating. Include state symbols.
(b(ii))[1]
Identify the type of reaction that occurs on heating $\mathrm{CaC_2O_4}$.
(b(iii))[1]
Identify another calcium-ion compound that will also give carbon dioxide and calcium oxide on heating.