Question

5. Insulin is a hormone responsible for the regulation of glucose levels in the blood. An aqueous solution of insulin has an osmotic pressure 2.5 mm Hg at 25°C. It is prepared by dissolving 0.100 g of insulin in enough water to make 125 mL of solution. What is the molar mass of insulin? Insulin is a nonelectrolyte. 6. A forensic chemist is given a white powder for analysis. She dissolves 0.50 g of the substance in 8.0 g of benzene. The solution freezes at 3.9°C. Can the chemist conclude that the compound is cocaine (C17H21NO4)? Freezing point of pure benzene is 5.5°C, Kf = 5.12 °C/m.

          5. Insulin is a hormone responsible for the regulation of glucose levels in the blood. An aqueous solution
of insulin has an osmotic pressure 2.5 mm Hg at 25°C. It is prepared by dissolving 0.100 g of insulin in
enough water to make 125 mL of solution. What is the molar mass of insulin? Insulin is a
nonelectrolyte.

6. A forensic chemist is given a white powder for analysis. She dissolves 0.50 g of the substance in 8.0 g
of benzene. The solution freezes at 3.9°C. Can the chemist conclude that the compound is cocaine
(C17H21NO4)? Freezing point of pure benzene is 5.5°C, Kf = 5.12 °C/m.

5. Insulin is a hormone responsible for the regulation of glucose levels in the blood. An aqueous solution
of insulin has an osmotic pressure 2.5 mm Hg at 25°C. It is prepared by dissolving 0.100 g of insulin in
enough water to make 125 mL of solution. What is the molar mass of insulin? Insulin is a
nonelectrolyte.

6. A forensic chemist is given a white powder for analysis. She dissolves 0.50 g of the substance in 8.0 g
of benzene. The solution freezes at 3.9°C. Can the chemist conclude that the compound is cocaine
(C17H21NO4)? Freezing point of pure benzene is 5.5°C, Kf = 5.12 °C/m.

Added by Alfredo S.

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