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Chemistry Science

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A 15.0 g sample of an unknown compound is dissolved in 100.0 g of benzene. The boiling point is raised 2.67 oC above the boiling point of pure benzene. What is the molar mass of the sample? Kb for benzene is 2.67oC/m.

  • Chemistry Science - ,

    delta T = Kb*molality
    Solve for molality = m

    m = moles solute/kg solvent
    Solve for moles solute

    moles solute = grams solute/molar mass solute.
    Solve for molar mass.

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