Question

A solution that contains 0.500 g phenol in 12.0 g cyclohexane freezes at ¨C2.44¡ãC and boils at 81.94¡ãC. Calculate the freezing©\point depression and boiling©\point elevation constants for cyclohexane.

Answer 1

Some of your "characters" aren't readable. Here is what you do.
moles phenol = g/molar mass
Solve for moles.

molality = moles phenol/kg solvent
Solve for molality

delta T = Kf*m
Solve for Kf

delta T = Kb*m
Solve for Kb.

Answer 2

3.6