A gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressure of 2.1 atm. What is the partial pressure of gas Y? Use StartFraction P subscript A over P subscript T EndFraction equals StartFraction n subscript a over n subscript T EndFraction..

Answer :  The partial pressure of X and Y gases are, 0.525 and 1.575 atm respectively.

Explanation : Given,

Moles of X = 2.0 mole

Moles of Y = 6.0 mole

Total pressure = 2.1 atm

Now we have to calculate the mole fraction of X and Y.

and,

Now we have to calculate the partial pressure of X and Y.

According to the Raoult's law,

where,

= partial pressure of gas

= total pressure of gas  = 2.1 atm

= mole fraction of gas

and,

Thus, the partial pressure of X and Y gases are, 0.525 and 1.575 atm respectively.

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