Question

In a box with a semi-permeable membrane containing a mixture of two gases

• A. The heavier molecules will pass out of the container more rapidly than the lighter molecules
• B. The lighter molecules will pass out of the container more rapidly than the heavier molecules
• C. Both heavier and lighter pass out of the container at equal rates
• D. Both a and c

Answer 1

The correct option is B The lighter molecules will pass out of the container more rapidly than the heavier molecules

In a box with a semi-permeable membrane containing a mixture of two gases, the lighter molecules will pass out of the container more rapidly than the heavier molecules. The gas leaving the container is somewhat enriched in the lighter molecules, while the residual gas is somewhat depleted.