Copper reacts with sulfur to form copper(I) sulfide.
4.000 g of copper will react completely with 1.010 g of sulfur.
In an experiment, 18.000 g of copper is heated with 9.500 g of sulfur until the reaction is complete.
Calculate the mass of sulfur remaining at the end of the experiment.
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.