Compound W (Mr=160.0M_{\text{r}} = 160.0Mr=160.0) contains carbon, hydrogen and oxygen only. A 3.25×10−4 mol3.25 \times 10^{-4} \text{ mol}3.25×10−4 mol sample of W burns completely in excess oxygen to yield 2.275×10−3 mol2.275 \times 10^{-3} \text{ mol}2.275×10−3 mol of carbon dioxide and 1.95×10−3 mol1.95 \times 10^{-3} \text{ mol}1.95×10−3 mol of water.
Deduce the molecular formula of W. Show your working.
79 exam-style questions on AQA A Level Chemistry Amount of substance, covering Relative atomic mass and relative molecular mass, The mole and the Avogadro constant, The ideal gas equation, Empirical and molecular formula, and Balanced equations and associated calculations. Each one has a worked solution and a mark scheme showing where the marks go.