Determine the vapor pressure of an aqueous ethylene glycol (C2H6O2) solution that is 14.8 % C2H6O2 by mass. The vapor pressure of pure water at 25 C is 23.8 torr. Determine the vapor pressure of an aqueous ethylene glycol solution that is 14.8 by mass. The vapor pressure of pure water at 25 is 23.8 . Is it a) 21.5 torr B) 20.3 torr C)17.4 torr D)22.7 torr