Question
WJEC Unit 1 Chemistry — Foundation tier
A student adds 5 g of marble chips to dilute hydrochloric acid and measures how long it takes to produce 50 cm^3 of gas. The experiment is repeated using 5 g of powdered marble.
(a) State which experiment finishes first. (1 mark) (b) Explain your answer using collision theory. (3 marks)
4 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.