If the rate constant of a reaction is 0.03 s -1 , how much time does it take for 7.2 mol L -1 concentration of the reactant to get reduced to 0.9 mol L -1 ? (Given: log 2 = 0.301)

1. A. 21.0 s
2. B. 69.3 s
3. C. 23.1 s
4. D. 210 s

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