Chemistry

The boiling point of diethyl ether CH3CH2OCH2CH3 is 34.500C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is cholesterol .

How many grams of cholesterol, C27H46O (386.6 g/mol), must be dissolved in 208.0 grams of diethyl ether to raise the boiling point by 0.5000C ?

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  1. delta T = Kb*molality
    You know delta T (0.500C) and Kb, solve for m.

    m = mols solute/kg solvent.
    You know m and kg solvent, solve for mols

    Then mols solute = grams/molar mass. You know mols and molar mass, solve for grams.

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    posted by DrBob222

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