Calculate the Freezing Point of a Solution Made by Dissolving $\degree$

Multiple Choice

Calculate the freezing point of a solution made by dissolving 3.50 g of potassium chloride (? = 74.55 g/mol) in 100.0 g of water. Assume ideal behavior for the solution; K_f = 1.86 $\degree$ C/m.

A) -1.7 $\degree$ C
B) -0.9 $\degree$ C
C) 0.0 $\degree$ C
D) 0.9 $\degree$ C
E) 1.7 $\degree$ C