(a)[3]
A 6.30 g sample of U contains 1.68 g of carbon and 0.14 g of hydrogen. Calculate the empirical formula of U.
(b)[3]
A 0.086 g sample of U is completely neutralised by $12.7\,\text{cm}^3$ of $0.150\,\text{mol dm}^{-3}$ KOH. One mole of U reacts with two moles of KOH. Calculate the relative formula mass of U.
(c)[1]
State the molecular formula of U.