posted by Ellenne .
Cyclopropane reacts to form propene in the gas phase. The reaction is first order in cylclopropane and has a rate constant of at 485 .
If a 2.5 reaction vessel initially contains 724 of cyclopropane at 485 , how long will it take for the partial pressure of cylclopropane to drop to below 104 ?
(if possible, can i be given the correct answer: i keep coming up with negatives)
You don't have units of k listed and you can't work the problem without them.. Show your work; perhaps we can find the error. That's better than us trying to figure out what you've done.