Chemistry
posted by Princess .
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?

I assume this is a nonpolar 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. 
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