A recycling company processes discarded electric motors. The table gives data for one batch.
| Quantity | Value |
|---|---|
| Mass of discarded motors | 4000 kg |
| Copper in the motors | 12% by mass |
| Copper recovered during recycling | 95% of the copper in the motors |
| Copper ore processed to obtain 1.0 kg of copper | 62.5 kg |
Assume that each kilogram of recycled copper replaces 1.0 kg of copper obtained from ore.
Calculate the mass of copper ore that does not need to be processed when this batch of motors is recycled.
Give your answer in kg.
99 exam-style questions on AQA GCSE Chemistry 10.2 Life cycle assessment and recycling, covering 10.2.1 Life cycle assessment and 10.2.2 Ways of reducing the use of resources. Each one has a worked solution and a mark scheme showing where the marks go.