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1.10g of an unknown compound reduces the freezing point of 75.22g benzene from 5.53C to 4.92C. What is the molar mass of the compound?

4 answers

delta T = Kf*molality
Solve for molality

molality = moles/kg solvent
Solve for moles

moles = grams/molar mass
Solve for molar mass.

9.23g/mol

117.5 g/mol

120 g/mol

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