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The normal freezing point of the unknown is 550c while the

An 5.15g sample of naphthalene C10H8 is dissolved in 44.7 g of an unknown solvent. The normal freezing point of the unknown is 5.50C while the solution of naphthalene in the unknown solvent freezes at 1.16C. Explain what is the freezing point depression constant, Kf, of the unknown solvent? Put in 3 significant figures

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