An oxygen generator contains 16.0 g of a solid compound, Q.
The compound decomposes according to the equation:
2Q(s)→2R(s)+3O2(g)\mathrm{2Q(s) \rightarrow 2R(s) + 3O_2(g)}2Q(s)→2R(s)+3O2(g)
The relative formula mass, MrM_rMr, of Q is 120.
At room temperature and pressure, one mole of gas occupies 24 dm3.
Calculate the volume of oxygen produced, in dm3\mathrm{dm^3}dm3, when all the compound Q decomposes.
151 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.