Answer to Question #169175 in General Chemistry for Ashley Baez

Question #169175

The reaction 2A → B is first order in A with a rate constant of 2.8 × 10−2 s−1 at 80°C. How long (in seconds) will it take for A to decrease from 0.650 M to 0.130 M?

 

1
Expert's answer
2021-03-08T06:04:38-0500

k×t = ln"\\frac{A_0}{A_t}"

2.8×10-2 × t = ln "\\frac{0.650}{0.130}"

t = (100/2.8) ln 5

t = (100×1.60)/2.8

t = 57.14sec


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