A laboratory technician prepares a stock solution of methylene blue for histopathological staining by dissolving 7.35 g of methylene blue powder in purified water to make exactly 350 cm3 of solution.
Calculate the concentration of this methylene blue solution in g dm−3\text{g dm}^{-3}g dm−3.
258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.