posted by mary .
which of the following would be expected to have the lowest freezing temperature?
per what? per gram? per mol? Any could have the lowest freezing point if I put a cup of any one and a scant amount of the others. For equal molality, what you want is
delta T = Kb*i*molality.
Kb is a constant, IF it is equal molality the m is equal, and the secret then is to determine the number of particles (i) from the others.