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16 Nov 2019
Consider the following equilibrium: PCl_3 (g) + Cl_2 (g) rightwardsharpoonoverleftwardsharpoon PCl_5 (g); delta H = -92 kJ The concentration of PCl_5 at equilibrium may be increased by A) the addition of PCl_3 B) decreasing the temperature C) increasing the pressure D) adding Cl_2 to the system E. the addition of neon The rate constant for a first-order reaction is 1.8 times 10^2 s^-1 at 62 K and 5.1 times 10^2 s^-1 at 898 K. What is the activation energy? A) 9.9 kJ/mol B) 10 kJ/mol C) 23 kJ/mol D) 23 kJ/mol E) 2800 kJ/mol What is the pH of a 0.043 M HClO_4 solution? A) 3.15 B) 12.63 C) 15.37 D) 1.37 E) 10.85 Which of the following pairs of species is pot a conjugate acid-base pair? A) HNO_2, NO_2^+ B) HOCl, OCl^- C) H_2 CO_3, HCO_3^- D) HSO_4^-, SO_4^2- E) O^2-, OH^- For the formation of 1 mol of nitrosyl chloride at a given temperature, delta H = -36 kJ. NO(g) + 1/2 Cl_2 (g) rightarrow NOCl (g) The activation energy for this reaction is 78 kJ/mol. What is the activation energy for the reverse reaction? A) 42 kJ/mol B) 114 kJ/mol C) -114 kJ/mol D) 78 kJ/mol E) -36 kJ/mol The K_a for benzoic acid is 6.3 times 10^-5. What is K_b for the benzoate ion? A) 1.6 times 10^4 B) 1.6 times 10^-10 C) 6.3 times 10^9 D) 6.3 times 10^-5 A) 6.3 times 10^-19
Consider the following equilibrium: PCl_3 (g) + Cl_2 (g) rightwardsharpoonoverleftwardsharpoon PCl_5 (g); delta H = -92 kJ The concentration of PCl_5 at equilibrium may be increased by A) the addition of PCl_3 B) decreasing the temperature C) increasing the pressure D) adding Cl_2 to the system E. the addition of neon The rate constant for a first-order reaction is 1.8 times 10^2 s^-1 at 62 K and 5.1 times 10^2 s^-1 at 898 K. What is the activation energy? A) 9.9 kJ/mol B) 10 kJ/mol C) 23 kJ/mol D) 23 kJ/mol E) 2800 kJ/mol What is the pH of a 0.043 M HClO_4 solution? A) 3.15 B) 12.63 C) 15.37 D) 1.37 E) 10.85 Which of the following pairs of species is pot a conjugate acid-base pair? A) HNO_2, NO_2^+ B) HOCl, OCl^- C) H_2 CO_3, HCO_3^- D) HSO_4^-, SO_4^2- E) O^2-, OH^- For the formation of 1 mol of nitrosyl chloride at a given temperature, delta H = -36 kJ. NO(g) + 1/2 Cl_2 (g) rightarrow NOCl (g) The activation energy for this reaction is 78 kJ/mol. What is the activation energy for the reverse reaction? A) 42 kJ/mol B) 114 kJ/mol C) -114 kJ/mol D) 78 kJ/mol E) -36 kJ/mol The K_a for benzoic acid is 6.3 times 10^-5. What is K_b for the benzoate ion? A) 1.6 times 10^4 B) 1.6 times 10^-10 C) 6.3 times 10^9 D) 6.3 times 10^-5 A) 6.3 times 10^-19
Casey DurganLv2
7 Jan 2019