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36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH =...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change in enthalpy, soln = solution) ΔΗ. = ΔΗ. + ΔΗ. + ΔΗ. 'soln 'solute 'solvent 'mix A) AH mix will always be an endothermic process B) AHsolute and AH solvent are sometimes exothermic processes C) Aholven makes no contribution to the overall AHoln D) AHolue and AHolvent will always be endothermic processes E) None of the statements are true 37. What type of concept...
37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction...
37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction Helium atom 1 Helium atom 2 8 (b) A) Capillary action B) Polarizability C) Molecularity D) Dynamic equilibrium E) Liquid crystal formation 38. What is the pH of a 0.20 M solution of NH3? Kb = 1.8 x 10' for NHz. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen...
ormation 38. What is the pH of a 0.20 M solution of NH? K = 18...
ormation 38. What is the pH of a 0.20 M solution of NH? K = 18 x 10 for NH. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen present in the molecule, effect of bond strength: K. B) Stability of the conjugate acid; bond polarity (H-X bond), effect of bond dissociation C) Stability of the conjugate base, amount of hydrogen in the molecule, bond polarity...
34. The phase changes B-C and D - E are not associated with temperature increases because...
34. The phase changes B-C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas liquid and gas TOC solid and liquid liquid B solid Heat added (1) 35. Which of these is a weak base? A) NaOH B) HCI E) CH3CH2OH C) Naci D) NH 36. When discussing energy...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran no ranom.don -- [ H-NCH27, N-H + 1 HOCCH27; COH Diamine Adipic acid tN(CH)N-C(CH2),C7,+ 2n H,O Nylon 6,6 A) Addition polymerization C) Condensation polymerization E) Elastomeric polymerization B) Acid-base reaction D) Ionic polymerization 34. The phase changes BC and D E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds...
Which of the following statements are true? A. The pH of a strong acid is always...
Which of the following statements are true? A. The pH of a strong acid is always lower than the pH of a weak acid. B. For a conjugate acid-base pair, Ka = 1/Kb. C. The pH of a solution can never be negative. D. At least two of the statements A-C are true. E. All of the statements A-C are false.
Which of the following statements is NOT true? Select all that apply. Group of answer choices...
Which of the following statements is NOT true? Select all that apply. Group of answer choices a. The concentration of H+ can be determined from the concentration of OH- and the Kw. b. An acid and its conjugate base differ only by one hydroxide ion c. An acid with a Ka > 1 is considered a weak acid d. The conjugate base of a strong acid will be a strong base e. Strong acids are expected to completely ionize in...
please help if possible Question 21 (5 points) Which of the following is true for the...
please help if possible
Question 21 (5 points) Which of the following is true for the conjugate base of a strong acid? The conjugate base of a strong acid acts as a weak acid. As the strength of the acid increases, the strength of the conjugate base decreases. The conjugate base of a strong acid is a strong base. As the strength of the acid increases, the strength of the conjugate base also increases. Question 22 (5 points) The Ksp...
6. Which of the following statements is not true? A) Bond breaking is endothermic. B) The...
6. Which of the following statements is not true? A) Bond breaking is endothermic. B) The bond dissociation energy for bond breaking is always negative. C) Bond making is exothermic. D) The bond dissociation energy for bond formation is always negative. 37. Using the bond dissociation energies given, calculate AH® for the following reaction. CH,CH -Br + H2O CH,CH-OH + HBr AH KJ/mol Bond A-B CH3CH2-Br H-OH сHCH-он H-Br A) +108 KJ/mol B) -130 KJ/mol C) -22 KJ/mol D) +22...
40. What is the pOH of a 0.045 M solution of calcium hydroxide, Ca(OH)2? A) 1.05...
40. What is the pOH of a 0.045 M solution of calcium hydroxide, Ca(OH)2? A) 1.05 B) 12.95 C) 12.65 D) 1.35 41. From Table 16.3, which of the following statements for Carbonic acid is true? See page 7 TABLE 16.3. Acid-Dissociation Constants of Some Common Polyprotic Acids Formula KI Ascorbic HỊCH, 80 X 10+ 16 X 10-12 Carbonic H.CO, 43 X 10 56 x 101 Citric HC,H,Op 74 X 10+ 1.7 X 100 4.0 X 10 Oxalic H.CO 5.9...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change in enthalpy, soln = solution) ΔΗ. = ΔΗ. + ΔΗ. + ΔΗ. 'soln 'solute 'solvent 'mix A) AH mix will always be an endothermic process B) AHsolute and AH solvent are sometimes exothermic processes C) Aholven makes no contribution to the overall AHoln D) AHolue and AHolvent will always be endothermic processes E) None of the statements are true 37. What type of concept...
37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction Helium atom 1 Helium atom 2 8 (b) A) Capillary action B) Polarizability C) Molecularity D) Dynamic equilibrium E) Liquid crystal formation 38. What is the pH of a 0.20 M solution of NH3? Kb = 1.8 x 10' for NHz. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen...
ormation 38. What is the pH of a 0.20 M solution of NH? K = 18 x 10 for NH. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen present in the molecule, effect of bond strength: K. B) Stability of the conjugate acid; bond polarity (H-X bond), effect of bond dissociation C) Stability of the conjugate base, amount of hydrogen in the molecule, bond polarity...
34. The phase changes B-C and D - E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds C) rearrange atoms within molecules D) increase the density of the sample gas liquid and gas TOC solid and liquid liquid B solid Heat added (1) 35. Which of these is a weak base? A) NaOH B) HCI E) CH3CH2OH C) Naci D) NH 36. When discussing energy...
33. The following scheme depicts what type of chemical reaction? Page 5 H Η Ο Iran no ranom.don -- [ H-NCH27, N-H + 1 HOCCH27; COH Diamine Adipic acid tN(CH)N-C(CH2),C7,+ 2n H,O Nylon 6,6 A) Addition polymerization C) Condensation polymerization E) Elastomeric polymerization B) Acid-base reaction D) Ionic polymerization 34. The phase changes BC and D E are not associated with temperature increases because the heat energy (q) is consumed to A) increase distances between molecules B) break intramolecular bonds...
please help if possible
Question 21 (5 points) Which of the following is true for the conjugate base of a strong acid? The conjugate base of a strong acid acts as a weak acid. As the strength of the acid increases, the strength of the conjugate base decreases. The conjugate base of a strong acid is a strong base. As the strength of the acid increases, the strength of the conjugate base also increases. Question 22 (5 points) The Ksp...
6. Which of the following statements is not true? A) Bond breaking is endothermic. B) The bond dissociation energy for bond breaking is always negative. C) Bond making is exothermic. D) The bond dissociation energy for bond formation is always negative. 37. Using the bond dissociation energies given, calculate AH® for the following reaction. CH,CH -Br + H2O CH,CH-OH + HBr AH KJ/mol Bond A-B CH3CH2-Br H-OH сHCH-он H-Br A) +108 KJ/mol B) -130 KJ/mol C) -22 KJ/mol D) +22...
40. What is the pOH of a 0.045 M solution of calcium hydroxide, Ca(OH)2? A) 1.05 B) 12.95 C) 12.65 D) 1.35 41. From Table 16.3, which of the following statements for Carbonic acid is true? See page 7 TABLE 16.3. Acid-Dissociation Constants of Some Common Polyprotic Acids Formula KI Ascorbic HỊCH, 80 X 10+ 16 X 10-12 Carbonic H.CO, 43 X 10 56 x 101 Citric HC,H,Op 74 X 10+ 1.7 X 100 4.0 X 10 Oxalic H.CO 5.9...
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