(4) An unknown gas occupies a volume of 4.75 L at 1500 K and 5.00 atm. If its mass is 5.45 g, what is the molar mass of the gas? Hint: molar mass = dRT/P.
We have given the volume V = 4.75 L
Pressure = 5 atm
Mass in gram = 5.45 gram
R = 0.02821 atmL/molK
Temperature T =1227°C=1227+273=1500 K
From ideal gas equation PV=nRT
n=0.1928
So molar mass
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