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?

Answer 1

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.

Answer 2

230