Equal Masses of Water and Ethylene Glycol (C₂H₆O₂)are Mixed

Equal masses of water and ethylene glycol (C₂H₆O₂) are mixed.At what temperature will the mixture freeze? The molal freezing point constant for water is −1.86°C/m.

A) −115°C
B) −93.0°C
C) −42.0°C
D) −30.0°C
E) −0.93°C