lung capacity was measured as 3.1 L at a body temperature of 37 ∘C and a pressure of 747 mmHg . How many moles of oxygen is in her lungs if air contains 21% oxygen?

Answer 1

Use PV = nRT and solve for n = number of mols air in the lungs.
Then n x 0.21 = mols oxygen.

Answer 2

.025

Answer 3

0.03 moles of O2