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Calculate the molality?

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Calculate the molality of a solution of naphthalene in cyclohexane if dissolving naphthalene in cyclohexane provokes a change in freezing temprature from 6.55 to -5.77 deg. C. Kf for cyclohexane is 20 deg.C/m.

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  1. temp drop = Kf (molality)

    12.32 C = 20 C/m ( molality)

    molality = 0.616molal

    your answer is (2 sigfigs): 0.62 molal

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