A molecule takes 3.0 seconds to diffuse across a membrane.If the thickness of the membrane is doubled,then how long does it take the molecule to diffuse across the thicker membrane?
A) 30 hours
B) 24 hours
C) 20 hours
D) 18 hours
E) 12 hours

Question

Quizplus · Accepted Answer

Diffusion time is proportional to the square of the distance. If the thickness is doubled, the time becomes four times longer. Therefore, 3.0 seconds becomes 12.0 seconds.

A Molecule Takes 3