Posted by Joshua help please on Sunday, October 26, 2008 at 5:38pm.
Calculate the freezing point of a solution containing 12.2grams of benzoic acid, C6H5CO2H, dissolved in 250 grams of nitrobenzene, C6H5NO2. The freezing point of nitrobenzene is 7.7 C, and its freezing point depression constant is 7.0 C/m.

Chemestry  DrBob222, Sunday, October 26, 2008 at 5:56pm
delta T = Kf*molality
Remember molality = #mols/kg solvent.
After you find delta T, then subtract that from 7.7 to find the freezing point of the solution. 
Chemestry  Joshua, Monday, October 27, 2008 at 1:21am
where you got the 7.7 from? and how you calculate the molality for it. I am stuck please help