Amixture of gases with a pressure of 800.0 mm hg contains 60% nitrogen and 40% oxygen by volume. what is the partial pressure of oxygen in this mixture?
a. 140.0 mm hg
b. 320.0 mm hg
c. 373.0 mm hg
d. 480.0 mm hg

Hello!

We have the following statement data:

Data:





As the percentage is the mole fraction multiplied by 100:



The mole fraction will be the percentage divided by 100, thus:
What is the partial pressure of oxygen in this mixture? 





To calculate the partial pressure of the oxygen gas, it is enough to use the formula that involves the pressures (total and partial) and the fraction in quantity of matter:

In relation to  :







b. 320.0 mm hg