b) k is a constant which depends on temperature and the nature of solvent. c) k is a constant only depends on the nature of solvent when concentration is very low, d) k is a constant depends on the nature of both solute and solvent. Question 27 Choose the right statement. At constant pressure. the concentration of a solution (contains non-vapor solute and does not make solid substances with solvent) increase, then: b) Boiling point decreases. d) a and c are correct. a) Boiling point increases. c) Freezing points decreases. Question 28 At 25°C, the saturated vapor pressure of pure water is 23.76mHg. When 2.7 mol of glycerine (C;HO;) is dissolved into 100 mol of H;O at the same temperature, the saturated vapor pressure of the solution decrease to: a) 23.13mmHg c) 0.62mmHg b) 0.64mmHg d) 23.10mmHg Question 29 There is a solution of non-electrolyte, and non-vapor solute in water which boils at 373.52 K. The molality concentration of this solution is (With k-0.52) a) 0.01 b) 1.0 c) 10 d) 0.1 Question 30 Calculate the osmosis pressure of 100 g solution 20% of glycerine in water at 25°C: a) 1 atm b) 0.1 atm c) 0.025 atm d) Other result

b) k is a constant which depends on temperature and the nature of solvent. c) k is a constant only depends on the nature of solvent when concentration is very low, d) k is a constant depends on the nature of both solute and solvent. Question 27 Choose the right statement. At constant pressure. the concentration of a solution (contains non-vapor solute and does not make solid substances with solvent) increase, then: b) Boiling point decreases. d) a and c are correct. a) Boiling point increases. c) Freezing points decreases. Question 28 At 25°C, the saturated vapor pressure of pure water is 23.76mHg. When 2.7 mol of glycerine (C;HO;) is dissolved into 100 mol of H;O at the same temperature, the saturated vapor pressure of the solution decrease to: a) 23.13mmHg c) 0.62mmHg b) 0.64mmHg d) 23.10mmHg Question 29 There is a solution of non-electrolyte, and non-vapor solute in water which boils at 373.52 K. The molality concentration of this solution is (With k-0.52) a) 0.01 b) 1.0 c) 10 d) 0.1 Question 30 Calculate the osmosis pressure of 100 g solution 20% of glycerine in water at 25°C: a) 1 atm b) 0.1 atm c) 0.025 atm d) Other result

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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