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A 11.7 m solution of the solute C2H5OH dissolved in the solvent chloroform is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 2552 g of C2H5OH.

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moles = grams/molar mass.
You have grams and molar mass. Calculate moles.
Then use m = moles/kg solvent. You know moles and m, calculate kg solvent.

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