Amixture of 0.220 moles rn, 0.350 moles o2 and 0.640 moles ar has a total pressure of 2.95 atm. what is the pressure of o2? a mixture of 0.220 moles , 0.350 moles and 0.640 moles has a total pressure of 2.95 . what is the pressure of ? 0.649 atm 1.17 atm 0.853 atm 0.969 atm 1.03 atm

0.85 atm

Explanation:

We start by getting the total number of moles of all gases.

Total moles = 0.220 + 0.350 + 0.640 = 1.21 mol

Then we get the fraction of Oxygen moles and multiply by the total pressure;

The pressure of O2 = 0.350 mol / 1.21 mol x 2.95 atm  

                                = 0.85 atm

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