Which of the following gases would diffuse fastest across the alveolar-capillary membrane?

Question

Quizplus · Accepted Answer

Carbon dioxide diffuses faster across the alveolar-capillary membrane than oxygen, nitrogen, or air due to its higher solubility in blood, despite its larger molecular weight compared to oxygen. This is explained by Graham's law of diffusion, which states that the rate of diffusion of a gas through a liquid is directly proportional to its solubility and inversely proportional to the square root of its molecular mass.

Which of the Following Gases Would Diffuse Fastest Across the Alveolar-Capillary