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9. A substance decays with zero order kinetics. What is the half-life given a rate constant...

9. A substance decays with zero order kinetics. What is the half-life given a rate constant that is 0.737 M–1 s–1 and an initial concentration of 1.75 M? How much of the substance remains after 22.5 seconds? 101 seconds?

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Answer #1

Zero order kinetics

A ---> D

- rA= k [A]0 = k = - d[A] / dt

When ---->

To find out how much is left after 22.5 s we replace in


As this does not make physical sense we conclude that

To find out how much is left after 101 s we replace in


As this does not make physical sense we conclude that

Please check the units of rate constant.

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