A 240 cm3240\,\mathrm{cm^{3}}240cm3 sample of nitrous oxide is heated. The nitrous oxide decomposes as shown.
2N2O(g)→2N2(g)+O2(g) \mathrm{2N_{2}O(g) \rightarrow 2N_{2}(g) + O_{2}(g)} 2N2O(g)→2N2(g)+O2(g)When the reaction is stopped, 75% of the nitrous oxide has decomposed. All gas volumes are measured at the same temperature and pressure.
Calculate the total volume of gas present when the reaction is stopped.
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152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.