Question

a solution consisting of 5.0 gm of an organic solute per 25 gm of CCl4 boils at 81.5 degree celecius .what is the molecular weight of the solute? If the boiling point is 76.8 degree celecius and Kb of CCl4 is 5.02 .

Answer 1

delta T = Kb*m
Calculate m

m = moles/kg solvent.
Calculate moles

moles = grams/molar mass
calculate molar mass.
Note the correct spelling of celsius.