An electrical substation uses sulfur hexafluoride gas, SF6\text{SF}_6SF6, as an arc-quenching medium. Following a maintenance procedure, a technician determines that 2160 dm3 of the gas, measured at room temperature and pressure, has leaked from a circuit breaker.
Calculate the mass, in kilograms, of the leaked sulfur hexafluoride gas. (relative formula mass: SF6=146\text{SF}_6 = 146SF6=146; 1 mol of any gas at room temperature and pressure occupies 24 dm3)
119 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.