The rate constant for a certain reaction is kkk = 4.80×10−3 s−1s−1 . If the initial reactant concentration was 0.100 MM, what will the concentration be after 6.00 minutes? Express your answer with the appropriate units.   A zero-order reaction has a constant rate of 3.60×10−4 M/sM/s. If after 70.0 seconds the concentration has dropped to 4.00×10−2 MM, what was the initial concentration?

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