delta T = Kf*m
Substitute and solve for m
m = mols/kg solvent
Substitute and solve for mols
mols = grams/molar mass. You have mols and grams, solve for molar mass.
Vitamin K is involved in normal blood clotting. When 2.40 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 8.05 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar mass of vitamin K.
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