Question

on dissolveing 2.34g of solute in 40g of benzene . the boiling point of solution was higher than that of benzene by 0.81k. kb value of benzene is 2.53 k.kg mol inverse . calculate the molar mass of the solute.
delta T = Kb*m
delta T = 0.81
Kb = 2.53
Solve for m = molality
Then m = grams/molar mass. You know m and you know grams, solve for molar mass.
Post your work if you get stuck.

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