chemistry homework help!!
posted by danielle .
many gases are shipped in high pressure containers. consider a steel tank whose volume is 42.0L and which contains O2 gas at a pressure of 165atm at 23 degrees celsius.
1.) what mass of O2 does the tank contain?
2.) what volume would the gas occupy at STP?
3.) At what temperature would the pressure be 150 atm?
4.) what would be the pressure of the gas if it were cooled to 15 degrees Celsius and put in a container whose volume is 55.0L?
R=0.08206L.atm/mol.K

You can work all of these with one or more of the following:
PV = nRT
n = grams/molar mass
(P1V1/T1) = (P2V2/T2
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