Magnesium reacts with oxygen to form magnesium oxide.
1.200 g of magnesium will react completely with 0.790 g of oxygen.
In an experiment, 3.600 g of magnesium is heated with 15.000 g of oxygen until the reaction is complete.
Calculate the mass of oxygen 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.