A5.00 g of a in . g of at aa 5.00 g of b in . g of .?at .

Compound B.

Explanation:

The freezing point depression is a colligative property. It depends on the number of particles (moles) present in the solution.

where b is the molal concentration

If m is constant (5 g), then

The compound with the greater molar mass has fewer moles and therefore fewer particles to depress the freezing point.

That must be Compound B, because Compound A has the lower freezing point.