Homework Help: Chemistry

Posted by Amy on Tuesday, February 15, 2011 at 10:52pm.

a solution of 4.65 of a carbohydrate in 100.0g of water has a density of 1.016g/mL and an osmotic pressure of 3.18 atm at 20.0 degrees celcius. calculate the molar mass of the carbohydrate.

Chemistry - DrBob222, Wednesday, February 16, 2011 at 3:07pm
Note the correct spelling of celsius.

pi = MRT
Solve for M = molarity. M = moles/L soln
Use density to determine the volume of 100 g of the soln, then calculate moles. Finally, moles = grams/molar mass.You know g and moles, solve for molar mass.

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