A manufacturer uses a reaction to make a useful substance. The balanced equation shows this substance as the only product.
Which statement correctly explains the atom economy of this reaction?
It is 100% because all the reactants are used up during the reaction.
It is 100% because all the desired product can be collected after the reaction.
It is 100% because all the atoms in the reactants end up in the desired product.
It is 100% because the desired product has the greatest relative formula mass.
152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.