posted by Amy .
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.
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.