The substance that the molecules have the strongest
attractions to one another is the sugar,
a solid. The answer is letter A. The solid has a more definite shape and
volume. The particles are locked into place. It cannot be further compressed
due to the bond that exists between the molecules. The kinetic energy of the
molecules is close to none because the molecules are so close and so compact
with each other.
The substance that releases the greatest amount of ions will have the greatest attractive forces within its solution, resulting in a reduced freezing point.
K₂SO₄ yields 3 ions
NH₄I yields 2 ions
CoCl₃ yields 4 ions
Freezing points:
CoCl₃ < K₂SO₄ < NH₄I
