A gaseous mixture is the mixture of 2 moles of A and 3 moles of B. Total pressure of the mixture is 5 atm. What are the partial pressures of A and B respectively?

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2 atm and 4 atm

2 atm and 3 atm

3 atm and 2 atm

6 atm and 2 atm

answer is B.

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Detailed Solution

Mole fraction of A=22+3=25=0.4Mole fraction of B = =32+3=35=0.6Partial pressure of gas A = 0.4×5 atm=2 atmPartial pressure of gas B = 0.6×5 atm=3 atm

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