At 25 degrees, the rate constant for the first order decomposition of a pesticide solution is 6.40 x 10^-2 min^-2. If the starti

Question

2 years ago

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At 25 degrees, the rate constant for the first order decomposition of a pesticide solution is 6.40 x 10^-2 min^-2. If the starti

ng concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25 degree Celsius?
The correct answer is 2.11 x 10^2 M, please show the steps.

Chemistry

1 answer:

EastWind [94] · Answer 1 · 2022-04-02T19:56:49+03:00

<span>If the initial amount is 1, the amount remaining at time t is exp(-rt), where r is the rate constant (.0064), and t is the time (62). The value of the exponential is 0.6725, and doing the obvious multiplication gives .0211 mole.

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