In a mixture of N2 and CO2 gases, the partial pressure of CO2 is 1.25 atm. The total pressure of the mixture is 5atm. The mole fraction of N2 in the mixture is

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0.82

0.75

0.80

0.65

answer is B.

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Detailed Solution

pN2+pCO2=pTotal pN2=pTotal -pCO2pN2=(5-1.25)=3.75 atm pN2=χN2×PTχN2=3.755=0.75

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