Asked by hannah

After you preform your experiment, you determine that the Kf value for naphthalene is 6.9 . You are using 10g of naphthalene and added 1.0 g of your unknown. The the freezing point of the solvent decreased by 4.42 when the unknown was added. Knowing this information, determine the molar mass of the unknown
Answered by DrBob222
delta T = Kf*m
Solve for m

m = moles/kg solvent
Solve for moles

moles = grams/molar mass
Solve for molar mass.
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