Case study·Standard multi-step (3/5)·Calculator allowed
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A medicine tablet contains of aspirin, . Use , , .
Total: 5 marks
(a) Find the molar mass of aspirin. (1 mark)
(b) Find the moles of aspirin in the tablet. (2 marks)
(c) Find the number of oxygen atoms in the tablet in terms of . (2 marks)
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