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An aqueous solution containing 35.1 grams of an unknown molecular (noneolectrolyte) compound in 152.5 grams of water was found to have a freezing point of -1.8 degrees C. Calculate the molar mass of the unknown compound.

  • Chem9 -

    delta T = Kf*molality
    Solve for molality

    molality = moles/kg solvent
    Solve for moles

    moles = grams/molar mass
    solve for molar mass.

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