Cyclopropane (C3H6) reacts to form propene (C3H6) in the gas phase. The reaction is first order in cyclopropane and has a rate constant of 5.87 x 10–4 at 485 oC. If a 2.5 L reaction vessel initially contains 723 torr of cyclopropane at 485 oC, how long in minutes will it take for the partial pressure of cyclopropane to drop to below 103 torr?
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