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Molecules from areas of higher concentration to areas of lower concentration.
Molecules from areas of lower concentration to areas of higher concentration.
Water molecules across a membrane
Gas molecules across a membrane.
Gas or water molecules across a membrane.
Molecules of sugar stop moving.
Water and sugar molecules are moving at the same speed.
The dissolved sugar molecules are evenly distributed throughout the solution.
There are the same number of water molecules as dissolved sugar molecules.
Two tablespoons of coffee are added.
Size of molecules
Steepness of the concentration gradient
A and B
A, B and C