Aand b are two gases that are mixed together; 2.50 mol a is mixed with 0.85 mol b. if the final pressure of the mixture is 1.75 atm, what are the partial pressures of a and b?

Partial pressure of A is 1,31 atm and partial pressure of B is 0,445 atm

Explanation:

In a mixture of gases, partial pressure is the pressure exerted by one only gas of the mixture. The total pressure of the mixture is the sum of partial pressure for each compound.

It is possible to obtain the partial pressure of a compound with:

(1)

Where Pₐ is partial pressure of A, Xₐ is mole fraction of A and P is total pressure.

Mole fraction of A and B are:

= 0,746

= 0,254

Using (1), partial pressure of A and B are:

= 1,31 atm

= 0,445 atm

I hope it helps!

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