4. (16 pts) Determine the molar mass of a protein when 6.89 mL of solution containing 823.42 mg of the protein has an os

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4 16 Pts Determine The Molar Mass Of A Protein When 6 89 Ml Of Solution Containing 823 42 Mg Of The Protein Has An Os 1 (50.94 KiB) Viewed 113 times

4. (16 pts) Determine the molar mass of a protein when 6.89 mL of solution containing 823.42 mg of the protein has an osmotic pressure of 4.27 atm at 315 K. R-0.0821 L'atm/(mol*K) 5. (16 pts) K = 0.51 °C/m K-1.86 °C/m A student determines the molar mass of an unknown nonelectrolyte using its freezing point depression. She found that the equilibrium temperature of a mixture of ice and water was 0.5°C. When she added 14.7 g of the unknown to the mixture, the temperature fell to -4.5°C. She then poured off the solution through a screen into a beaker. The mass of the solution was 123.9 g. a. What is the molality of the unknown solution in water? bed b. What is the molar mass of the unknown? 6. (16 pts) A solution is made by dissolving 29.0 g of C₁H₂NO, a nonvolatile nonslestralyte, in 750.0 g water. The vapor pressure of pure water at 25 °C is 23.8 1977 a. Calculate the mole fraction of water, XH₂0 ANT 29 a n as ot EEN m mi m ke> SO it 2 Mi due htm i. De to de Ca ulatc ied ic to w e: 4 r