A manufacturer is comparing four routes for making a pharmaceutical ingredient. The masses shown are the masses of the desired product and of all products formed in one reaction batch.
| Route | Desired product / g | All products / g |
|---|---|---|
| A | 40 | 100 |
| B | 60 | 60 |
| C | 72 | 90 |
| D | 30 | 50 |
Which route has the highest atom economy?
Route A
Route B
Route C
Route D
151 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.