The freezing point (Tf) for t-butanol is 25.50°C and Kf is 9.1°C/m. Usually t-butanol absorbs water…

The freezing point (Tf) for t-butanol is 25.50°C and Kf is
9.1°C/m. Usually t-butanol absorbs water on exposure to the air. If
the freezing point of a 7.6-g sample of t-butanol is measured as
24.59°C, how many grams of water are present in the sample?