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March 29, 2017

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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

  • chemistry - ,

    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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