Posted by Nefret on .
Vitamin K is involved in normal blood clotting. When 1.36 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 4.56 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar mass of vitamin K.

Gen Chem II 
DrBob222,
delta T = Kf*m.
Substitute and solve for molality.
Then m = mols/kg solvent.
Sustitute and solve for mols.
Then mol = grams/molar mass. You know mol and grams, solve for molar mass. 
Gen Chem II 
Nefret,
Thanks Dr. Bob,
Can you solve this stepbystep so that I can understand how to do this. I am really confused and lost. Thanks.