May/June 2026 Paper 13

2026 · 40 questions · 40 parts · 40 marks

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3Gas Volume CalculationsMedium1 mark
Antimony is produced in a 2-stage process from its sulfide, SbS.
  • SbS is heated in oxygen, producing SbO and SO.
  • The SbO is then reduced by carbon, producing Sb and CO.
What is the maximum volume of CO, measured at room conditions, produced from 20 mol of SbS?