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# PV=nRT calculation HELP!!!?

## So Im having a little trouble at my job trying to figure this little problem out. I have to Calculate (n) P is equal to the saturated vapor pressure at room temperature which is supposed to found online and I can not find it. Maybe im looking in all the wrong places. V is equal to 2 Liters R is 8.414472 J*K^-1 T would be in Kelvon which is estimated to 300K for room temperature.... I need to find the amount of moles and then convert it to some mass I assume that it would be grams. A water molecule is about 18 grams so i think that is what you use.... can someone please help me in solve this.. I have to do them for other temperatures as well but once I see one problem ill learn from that.

Asked By: Peter G - 6/16/2010
Best Answer - Chosen by Asker
P= standard pressure = 1 atm V= 2L n= ? R=.08206 T=300K n = PV/RT n = (1)(2)/(.08206)(300)
Answered By: Pr0blumz - 6/16/2010
Additional Answers (1)
Look under "water/steam equilibrium" or "water/steam tables" or "vapor-liquid equilibrium" to find data relating to vapor pressures of liquids... More
Source(s):
Answered By: Kristie - 6/16/2010

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