Question

The green molecules are moving from an area of high concentration to an area of low concentration. When will this movement will stop?
A. When all the green molecules are on the right side.
B. When more green molecules some of the green molecules have moved.
C. When there is an equal number of green molecules on each side.
D. When all the energy is used up.

Answer 1

C. When there is an equal number of molecules on each side

Answer 2

I agree it is C. Hope this helps