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Please show procedure: Chemistry C4H8 (g) ----> 2C2H4 (g) is first-order with respect to C4H8. If...

Please show procedure: Chemistry

C4H8 (g) ----> 2C2H4 (g) is first-order with respect to C4H8. If the first-order half-life of C4H8 is 9.72 hours, how long will it take for 80.0% of the C4H8 initially present to decompose? Express your answer in hours. (answer: 22.6 hours)

The reaction 2C3H6 (g) ----> 3C2H4 (g) is second-order with respect to C3H6. If the second-order half-life of C3H6 is 2.48 min, how long will it take 80.0% of the C3H6 initially present to react? (answer: 9.92 min)

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