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120 g of an ideal gas of molecular weight 40 g mol^-1 are confined to a volume of 20 L at 400 K. Using R=0.0821 L atm K^-1 mol^-1 , the pressure of the gas is

120 g of an ideal gas of molecular weight \[40 g mol^{-1}\] are confined to a volume of 20 L at 400 K. Using R=0.0821 L atm \[K^{-1}mol^{-1}\] , the pressure of the gas is
a) 4.90 atm
b) 4.92 atm
c) 5.02 atm
d) 4.96 atm

Answer: b
Explanation:
q35

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