What will the concentration be after 9.00 minutes? part b a, Ask an Expert

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A car starts at mile marker 145 on a highway and drives at 55 MI/HR in the direction of decreasing marker numbers. What mile marker will the car reach after 2 hours? Part A The rate constant for a certain reaction is K = 5.60×10^?3 s^-1 . If the initial reactant concentration was 0.500 M , what will the concentration be after 9.00 minutes? Part B A zero-order reaction has a constant rate of 1.30×10^?4 M/s. If after 60.0 seconds the concentration has dropped to 8.00×10^?2 M, what was the initial concentration?

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