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C. 22.97 torr D. 78.12 tor 72. A 0.25g of a certain substance is dissolved in 60g of water. The freezing point of the solution is- 0.050 °C. Knowing that the substance has a van't Hoff factor of1 and is non-volatile, what is the molar mass of the substance? (Freezing point depression of water =- 1.86 °C/m) A. 0.00016 g/mol B. 156.25 g/mol C. 186.54 g/mol D. 1.86 g/mol 73. What is the osmotic pressure (at 20 °C) of a solution made by dissolving 13g of sucrose in 117g of water? The total volume of the solution is 125mL at 20 °C. A. 7.31 atm B. 0.30 atm C. 342 atm D. 0.08 atm 74. A solution contains 3.86g of magnesium chloride and 250g of water. Compute for the freezing point depression of the solution. (Kr water: 1.86 °C/m) A. 0.16 °C B. 0.25 °C C. -0.25 °C D. -0.90 °C 75. Assume that a 1-L solution contains 35g of potassium chloride (MM: 74.6 g/mol). Compute for the osmotic pressure if the solution is at 298 K...(R 0.08206 L-atm/ mol-K) A. 22.95 atm 24.50 atm C. 11.47 atm -11.47 atm ABCD

C. 22.97 torr D. 78.12 tor 72. A 0.25g of a certain substance is dissolved in 60g of water. The freezing point of the solution is- 0.050 °C. Knowing that the substance has a van't Hoff factor of1 and is non-volatile, what is the molar mass of the substance? (Freezing point depression of water =- 1.86 °C/m) A. 0.00016 g/mol B. 156.25 g/mol C. 186.54 g/mol D. 1.86 g/mol 73. What is the osmotic pressure (at 20 °C) of a solution made by dissolving 13g of sucrose in 117g of water? The total volume of the solution is 125mL at 20 °C. A. 7.31 atm B. 0.30 atm C. 342 atm D. 0.08 atm 74. A solution contains 3.86g of magnesium chloride and 250g of water. Compute for the freezing point depression of the solution. (Kr water: 1.86 °C/m) A. 0.16 °C B. 0.25 °C C. -0.25 °C D. -0.90 °C 75. Assume that a 1-L solution contains 35g of potassium chloride (MM: 74.6 g/mol). Compute for the osmotic pressure if the solution is at 298 K...(R 0.08206 L-atm/ mol-K) A. 22.95 atm 24.50 atm C. 11.47 atm -11.47 atm ABCD

Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter10: Properties Of Solutions
Section: Chapter Questions
Problem 7RQ
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C. 22.97 torr D. 78.12 tor 72. A 0.25g of a certain substance is dissolved in 60g of water. The freezing point of the solution is- 0.050 °C. Knowing that the substance has a van't Hoff factor of1 and is non-volatile, what is the molar mass of the substance? (Freezing point depression of water =- 1.86 °C/m) A. 0.00016 g/mol B. 156.25 g/mol C. 186.54 g/mol D. 1.86 g/mol 73. What is the osmotic pressure (at 20 °C) of a solution made by dissolving 13g of sucrose in 117g of water? The total volume of the solution is 125mL at 20 °C. A. 7.31 atm B. 0.30 atm С. 342 atm D. 0.08 atm 74. A solution contains 3.86g of magnesium chloride and 250g of water. Compute for the freezing point depression of the solution. (Kr water: 1.86 °C/m) A. 0.16 °C B. 0.25 °C C. -0.25 °C D. -0.90 °C 75. Assume that a 1-L solution contains 35g of potassium chloride (MM: 74.6 g/mol). Compute for the osmotic pressure if the solution is at 298 K. (R 0.08206 L-atm/ mol-K) A. 22.95 atm B. 24.50 atm C2 11.47 atm D. -11.47 atm
Transcribed Image Text:C. 22.97 torr D. 78.12 tor 72. A 0.25g of a certain substance is dissolved in 60g of water. The freezing point of the solution is- 0.050 °C. Knowing that the substance has a van't Hoff factor of1 and is non-volatile, what is the molar mass of the substance? (Freezing point depression of water =- 1.86 °C/m) A. 0.00016 g/mol B. 156.25 g/mol C. 186.54 g/mol D. 1.86 g/mol 73. What is the osmotic pressure (at 20 °C) of a solution made by dissolving 13g of sucrose in 117g of water? The total volume of the solution is 125mL at 20 °C. A. 7.31 atm B. 0.30 atm С. 342 atm D. 0.08 atm 74. A solution contains 3.86g of magnesium chloride and 250g of water. Compute for the freezing point depression of the solution. (Kr water: 1.86 °C/m) A. 0.16 °C B. 0.25 °C C. -0.25 °C D. -0.90 °C 75. Assume that a 1-L solution contains 35g of potassium chloride (MM: 74.6 g/mol). Compute for the osmotic pressure if the solution is at 298 K. (R 0.08206 L-atm/ mol-K) A. 22.95 atm B. 24.50 atm C2 11.47 atm D. -11.47 atm
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