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The reaction L -> M starts with 10 g of L. After 30 minutes 5 g of L remain, and after 90 minutes 1.25 g remain. What is the order of the reaction?
- 0
- 2
- 1
- 3
Correct answer: 1
Solution
The amount halves every 30 minutes (10->5->2.5->1.25), a constant half-life independent of concentration, which is the signature of a first-order reaction.
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