Question

A gaseous mixture of O2 and N2 contains 32.8 % nitrogen by mass.

What is the partial pressure of oxygen in the mixture if the total
pressure is 445 Torr ? Express you answer numerically in torr.

Answer 1

32.8% by mass??

100 g = 32.8 g of N2 + 67.2 g of O2

32.8/28 = 1.17 moles of N2

67.2/32 = 2.1 moles of O2

What is the partial pressure of oxygen?

P(O2 ) = ( 2.1 /3.27)*785 = 504.1 mmHg (answer)

Step-by-step explanation: