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Cyclopropane (C3H6)reacts to form propene (C3H6) in the gas phase. The reaction is first order in cylclopropane and has a rate constant of 5.87×10-4s-1at 485 °C.

Part A If a 2.1 -L reaction vessel initially contains 720 torr of cyclopropane at 485 °C, how long in minutes will it take for the partial pressure of cylclopropane to drop to below 105 torr? Enter your time in minutes to three significant figures.

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