Kf of 1,4-dioxane is 4.9 mol-1 for 1000 g. The depression in freezing point for a 0.001 m solution in dioxane is:
0.0049
4.9
0.49
0.049
A 0.001 molal solution of in water had a freezing point depression of 0.0054°C. If Kf for water is 1.80, the correct formulation for the above molecule is