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March 27, 2017

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A solution containing 0.750g of an unknown substance in 30.0g of cyclohexane was found to freeze at 3.1 degree Celsius. What is the molar mass of the unknown substance?

  • Chemistry - ,

    I assume this is a non-polar substance where i = 1
    delta T = i*Kf*m
    Substitute and solve for molality.

    molality = mols/L
    Substitute and solve for mols.

    mols = grams/molar mass
    Subtitute and solve for molar mass.

  • Chemistry - ,

    230

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