A student investigates how the proportion of zinc affects the tensile strength of copper-zinc alloys (brass). The results are shown in Table 1.
Table 1
| Percentage by mass of zinc in alloy (%) | Tensile strength of alloy (MPa) |
|---|---|
| 0 | 220 |
| 5 | 240 |
| 10 | 260 |
| 15 | 280 |
| 20 | 300 |
| 25 | 315 |
| 30 | 330 |
| 35 | 350 |
Determine the percentage by mass of copper in a copper-zinc alloy with a tensile strength of 312 MPa.
Practise Edexcel GCSE Chemistry Transition metals, alloys and corrosion with exam-style questions for Foundation and Higher tier. 97 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
