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March 28, 2017

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Calculate the molality (m) of a 1820 g sample of a solution of the solute hexane dissolved in the solvent C6H6 if the sample contains 0.419 kg of hexane.

  • Chemistry - ,

    Remember the definition of molality.
    m = # moles solute/kg solvent.

    Total g solution = 1820
    mass hexane (C6H14) = 419
    mass solvent (C6H6) = 1820-419 = 1401 g.

    moles C6H14 = 419/molar mass.
    kg solvent = 1.401
    You do the math. Check my numbers.

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