Question

What is the volume of 1.2 moles of water vapor at STP? Spell check Please round final answers to the tenth position, one place after the decimal. Please only report the numerical answer.

Answer 1

At S.T.P the molar volume of a gas is 22.4L,that is 1mol=22.4l therefore the voume of 1.2 moles of water vapor is
1.2 x22.4=26.7L

alternatively
from ideal gas law v=nRT /P
At S.T.P the temperature is 273k and pressure is 1atm
R=0.0831 atm/mol/k
v=(1.2 x 0.0821 x273)/(1am)=26.8L