An unknown gas has a density of 1.643 g / L when the pressure is 2.507 atm and the temperature is 25.1 oC. What is the molecular weight of this gas? Note that the gas constant R has the value 0.0820584 L atm / K mol.
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Answer:
ideal gas equation PV=nRT
also
PM=DRT
2.507M=1.643×0.0821×298
as 25oC=298K
M=40.197/2.507
M=16.03g/mol
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