delta T = Kf*m
Substitute and solve for m = molality
m = mols/kg solvent
Substitute and solve for mols.
mols = grams/molar mass. You know grams and mols, solve for molar mass.
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 2.50 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 6.43 °C. The freezing point and Kf constant for cyclohexane can be found here. Calculate the molar mass of quinine.
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