Which of the following describes a chemical change?
a. ethanol boils when heated.
b. ethanol has a high heat capacity.
c. ethanol can be produced by the fermentation of grapes.
d. ethanol is a clear

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m