A gaseous mixture of O2 and N2 contains 35.4 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 0.918 atm

0.565 atm

Explanation:

Let's assume we have 100 g of the gas. We'd then have 35.4 g of N₂ and (100 - 35.4) 64.6 g of O₂.

Now we convert those masses into moles, using their respective molar masses:

Then we calculate the molar fraction of O₂:

Finally we calculate the partial pressure of O₂:

the answer is true. hope it .

what is the question here. i think you messed up.