1MA0 Higher June 2017 Paper 2 Q18
18 Ibrar mixes 74 g of lead and 126 g of tin to make 200 g of an alloy.
Lead has a density of 11.34 g/cm\(^3\).
Tin has a density of 7.31 g/cm\(^3\).
Work out the density of the alloy.
Give your answer correct to 1 decimal place. (3)
| Answer | Mark | Notes |
|---|---|---|
| 8.4 | 3 | M1 for using \(d = m/v\) e.g. \(11.34 = 74/V\) or vol. of lead (= 6.5(25...)) or vol. of tin (= 17.2(3...)) M1 (dep) for a complete method using \(200 \div\) “total volume” A1 for answer in range 8.4 to 8.44 |