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Question

The rate of a first-order reaction is 0.04 mol L−1s−1 at 10 seconds and 0.03 mol L−1 s−1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is:

A
24.1 s
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B
34.1 s
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C
44.1s
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D
54.1 s
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