Chemistry · May / June 2020 · Paper 12 · Question 22

Two fertilisers are made by mixing chemical compounds. Fertiliser X contains 500 g of NH4NO3 and 500 g of (NH4)2SO4 per kilogram. Fertiliser Y contains 700 g of NH4NO3 and 300 g of CaSO4 per kilogram. Which fertiliser contains the higher percentage of nitrogen by mass and which contains the higher percentage of sulfur by mass? [Mr: NH4NO3, 80; (NH4)2SO4, 132; CaSO4, 136]

1. AX / X
2. BX / Y
3. CY / X
4. DY / Y

As printed in the paper