The rearrangement of cyclopropane to propene at 500 °C (CH2)3CH3CH=CH2 is first

Question

The rearrangement of cyclopropane to propene at 500 °C
(CH2)3CH3CH=CH2
is first order in (CH2)3 with a rate constant of 6.70×10-4 s-1.
If the initial concentration of (CH2)3 is 0.189 M, the concentration of (CH2)3 will be 5.27×10-2 M after ______s have passed. Use the References to access important values if needed for this question The rearrangement of cyclopropane to propene at 500 °c (CH2)3>CH3CH-CH2 is first order in (CH2)3 with a rate constant of 6.70x10-4 s-1 If the initial concentration of (CH2)3 is 0.189 M, the concentration of (CH2)3 will be 5.27x102 M after s have passed. Submit Answer Retry Entire Group 7 more group attempts remaining

Explanation / Answer

For first order reaction

[A] = [A0] exp (-kt)

Final concentration = Initial concentration x exp (-rate constant x time)

5.27*10^-2 = 0.189 x exp (-6.70*10^-4 x k)

0.2788 = exp (-6.70*10^-4 x t)

1.277 = (6.70*10^-4 x t)

t = 1906 s

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