A technician needs 9.0 g of sodium thiosulfate for a class practical. The only supply is a stock solution with a concentration of 30 g/dm3.
What volume of the stock solution should the technician measure out?
3.3 dm33.3\ \text{dm}^33.3 dm3
0.30 dm30.30\ \text{dm}^30.30 dm3
270 dm3270\ \text{dm}^3270 dm3
300 dm3300\ \text{dm}^3300 dm3
131 exam-style questions on AQA GCSE Chemistry 3.2 Use of amount of substance in relation to masses of pure substances, covering 3.2.1 Moles, 3.2.2 Amounts of substances in equations, 3.2.3 Using moles to balance equations, 3.2.4 Limiting reactants, 3.2.5a Concentration of solutions, and 3.2.5b Relating mass, volume and concentration. Each one has a worked solution and a mark scheme showing where the marks go.