The proportion of gold in an alloy is measured in carats:
Table 1 shows information about two dental crowns, X and Y, made from alloys containing only gold and copper.
Complete Table 1 by finding the missing values represented by the question marks.
| Dental crown | Carat | Mass of gold in grams | Mass of copper in grams |
|---|---|---|---|
| X | ? | 16 | 8 |
| Y | 15 | 10 | ? |
Practise AQA GCSE Chemistry Using materials (chemistry only) with exam-style questions for Foundation and Higher tier. 24 questions covering Corrosion and its prevention, Alloys as useful materials, and Ceramics, polymers and composites, matched to the AQA GCSE Chemistry (8462) 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.