Solution :
If these units (Pressure in Pa; Volume in
m3) are used, the value of the gas constant R is
8.314.
If these units (Pressure in atm; Volume in
dm3) are used, the value of the gas constant R is
0.08206.
pV = nRT
pV = (m/Mr)(RT)
Mr = (m)(R)(T) / (pV)
Mr = (m)(0.08206)(T) / (pV/1000)
Mr = (m)(82.06)(T) / (pV)
Mr = (m)(22400/273)(T) / (pV)
Mr = (m)(22400)(T) / (pV)(273)
