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C 18. A solution that is 33.6 % by mass of phenol (C&HSQH) in water is prepared. What is the mole fraction of the phenol? A. 0.0969 B. 0.0643TC. 0.0883 D. 0.0604 E. 0.357or botutse A EI ansvlo nuh olulo om zninano A atuloz nari movlor som nisno nszlo bru sulo to olom laupa enicnoo

C 18. A solution that is 33.6 % by mass of phenol (C&HSQH) in water is prepared. What is the mole fraction of the phenol? A. 0.0969 B. 0.0643TC. 0.0883 D. 0.0604 E. 0.357or botutse A EI ansvlo nuh olulo om zninano A atuloz nari movlor som nisno nszlo bru sulo to olom laupa enicnoo

Chemistry
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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- 23. A solution is 40.0% by mass benzene (CoHe) in carbon tetrachloride (CC44) at 20 °C. The vapor pressure of pure benzene and pure carbon tetrachloride at this temperature is 74.61 mmHg and 91.32 mmHg, respectively. Calculate the vapor pressure of the solution at 20 °C: A. 66.4 mmHg B. 73.8 mmHg C. 81.8 mmHg D. 83.0 mmHg E. 84.6 mmHg 24. Which of the following aqueous solutions has the highest boiling point (assume 100% dissociation for all soluble ionic compounds)? A. 0.10m Al(NO3)3 B. 0.11m NazSO4 C. 0,15m K>CO3 D, 0.18m NaCl E. 0.35m C6H1206 ' 25. What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C2H6O2) and 85.0 g H2O? Kr of water is 1.86 °C/m. A. 17.6 °C B. 1.50 °C C. –1.50 °C D. –17.6 °C E. –176 °C 26. 0.102 g of an unknown compound dissolved in 100. mL of water has an osmotic pressure of 28.1 mmHg at 20 °C. Calculate the molar mass of the compound. A. 727 g/mol B. 663 g/mol C. 1.10x10² g/mol D. 1.15 g/mol E. 0.872 g/mol r 27. Calculate the approximate freezing point of a solution made from 21.0 g NaCI and 1.00x10² g of H2O. [Kr of water is 1.86 °C/m.] A. -13.4 °C B.-6.68 °C C. -3.59 °C D. 3.59 °C E. 6.68 °C
Transcribed Image Text:- 23. A solution is 40.0% by mass benzene (CoHe) in carbon tetrachloride (CC44) at 20 °C. The vapor pressure of pure benzene and pure carbon tetrachloride at this temperature is 74.61 mmHg and 91.32 mmHg, respectively. Calculate the vapor pressure of the solution at 20 °C: A. 66.4 mmHg B. 73.8 mmHg C. 81.8 mmHg D. 83.0 mmHg E. 84.6 mmHg 24. Which of the following aqueous solutions has the highest boiling point (assume 100% dissociation for all soluble ionic compounds)? A. 0.10m Al(NO3)3 B. 0.11m NazSO4 C. 0,15m K>CO3 D, 0.18m NaCl E. 0.35m C6H1206 ' 25. What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C2H6O2) and 85.0 g H2O? Kr of water is 1.86 °C/m. A. 17.6 °C B. 1.50 °C C. –1.50 °C D. –17.6 °C E. –176 °C 26. 0.102 g of an unknown compound dissolved in 100. mL of water has an osmotic pressure of 28.1 mmHg at 20 °C. Calculate the molar mass of the compound. A. 727 g/mol B. 663 g/mol C. 1.10x10² g/mol D. 1.15 g/mol E. 0.872 g/mol r 27. Calculate the approximate freezing point of a solution made from 21.0 g NaCI and 1.00x10² g of H2O. [Kr of water is 1.86 °C/m.] A. -13.4 °C B.-6.68 °C C. -3.59 °C D. 3.59 °C E. 6.68 °C
18. A solution that is 33.6 % by mass of phenol (C6HSQH) in water is prepared. What is the mole fraction of the phenol? A. 0.0969 B. 0.06431C. 0.0883 D. 0.0604 E. 0.357loz boteu A E Insvloz nh stuloz om znisinos A otuloz neri msvlor 9om nicinoo. nsrlo bru aiuloz to slomn laupo enienoo - 19. A 1.35 m solution of NAOCI in water is prepared. What is the mole fraction of the niano a NAOCI? A. 0,0135 B. 0.0243 C. 0.0271 D. 0.0237 E. 0.0263ino driw tnsvloz enisinoo (ebnod slqiu o Tabrupil oldiozim snc terls isq eni wollol ordh lle teri senog29n doir WI: ( obnoidoeios nodiso bns (HO) ons20 :E un • 20. Determine the mass percent HCI in a 1.2 M solution of hydrochloric acid with a density of 1.019 g/mL. A. 3.0 % B. 4.3 % C. 8.6 % D. 13% E. 30. % to g 8.2 m 12 log E ynivlozaib vd obnm noituloz e ni 1A to noitail olom adi ocluole).21 40.3 e2.0.a TE.0. t00.0.8a, 000.0.A1stw a 21. Oxygen gas makes up 21 % of the atmosphere by volume. What is the solubility of O2(g) in water at 25 °C if the atmospheric pressure is 741 mmHg? The Henry's law constant for oxygen gas at 25 °C is 1.3x10-3 mol/L-atm. A. 2.7X104M B. 1.3x10-³ M C. 6.2x10³ M D. 9.6x10-3 M E. 0.96 M lo E gniviozzib vd obsm noinloz a mi HO:HD HOH lo s Pem ar onsluole a1 HOCH CH OH 3 28 ot IGL YSaP Bed Ct D 350 E S0P • 22. The vapor pressure of water at 45.0 °C is 71.93 mmHg. What is the vapor pressure of water over a solution prepared from 75.0g of citric acid (C&H8O7) in 0.420 kg of water at this temperature? A. 1.22 mmHg B. 42.3 mmHg C. 43.0 mmHg D. 70.7 mmHg E. 73.2 mmHg
Transcribed Image Text:18. A solution that is 33.6 % by mass of phenol (C6HSQH) in water is prepared. What is the mole fraction of the phenol? A. 0.0969 B. 0.06431C. 0.0883 D. 0.0604 E. 0.357loz boteu A E Insvloz nh stuloz om znisinos A otuloz neri msvlor 9om nicinoo. nsrlo bru aiuloz to slomn laupo enienoo - 19. A 1.35 m solution of NAOCI in water is prepared. What is the mole fraction of the niano a NAOCI? A. 0,0135 B. 0.0243 C. 0.0271 D. 0.0237 E. 0.0263ino driw tnsvloz enisinoo (ebnod slqiu o Tabrupil oldiozim snc terls isq eni wollol ordh lle teri senog29n doir WI: ( obnoidoeios nodiso bns (HO) ons20 :E un • 20. Determine the mass percent HCI in a 1.2 M solution of hydrochloric acid with a density of 1.019 g/mL. A. 3.0 % B. 4.3 % C. 8.6 % D. 13% E. 30. % to g 8.2 m 12 log E ynivlozaib vd obnm noituloz e ni 1A to noitail olom adi ocluole).21 40.3 e2.0.a TE.0. t00.0.8a, 000.0.A1stw a 21. Oxygen gas makes up 21 % of the atmosphere by volume. What is the solubility of O2(g) in water at 25 °C if the atmospheric pressure is 741 mmHg? The Henry's law constant for oxygen gas at 25 °C is 1.3x10-3 mol/L-atm. A. 2.7X104M B. 1.3x10-³ M C. 6.2x10³ M D. 9.6x10-3 M E. 0.96 M lo E gniviozzib vd obsm noinloz a mi HO:HD HOH lo s Pem ar onsluole a1 HOCH CH OH 3 28 ot IGL YSaP Bed Ct D 350 E S0P • 22. The vapor pressure of water at 45.0 °C is 71.93 mmHg. What is the vapor pressure of water over a solution prepared from 75.0g of citric acid (C&H8O7) in 0.420 kg of water at this temperature? A. 1.22 mmHg B. 42.3 mmHg C. 43.0 mmHg D. 70.7 mmHg E. 73.2 mmHg
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