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A solution which contains 40.3 g of an unknown molecular compound in 360 g of water freezes at -5.07°C.
What is the molar mass of the unknown?

  • chemistry -

    delta T = Kf*m
    Substitute and solve for molality.

    molality = mols/kg solvent.
    Substitute and solve for mols.

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

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