An adult inhales about 6.0 x 10⁻⁴ m³ of fresh air during a breath. only 20% of fresh air is oxygen. assume the pressure in the lungs is 1.0 x 10⁵ pa and the air is at a temperature of 300 k.
how many oxygen molecules are in each breath?
a. 1.4 x 10²³
b. 2.9 x 10²¹
c. 4.9 x 10⁻⁴
d. 2.9 x 10²⁵
Answers: 3
of particles.
= 0.98 atm 
of oxygen contain=
molecules of oxygen 
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An adult inhales about 6.0 x 10⁻⁴ m³ of fresh air during a breath. only 20% of fresh air is oxygen....
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