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27. C
30. B
47. A
48. C
49. B
51. A
52. B
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27. If the half-life of a radioactive element is 500...
A rechargeable nickel-cadmium (NiCd) battery contains the following half-reactions: NiO2 +2H2O(l)+2e– → Ni(OH)2 +2OH– E0 =0.49V...
A rechargeable nickel-cadmium (NiCd) battery contains the following half-reactions: NiO2 +2H2O(l)+2e– → Ni(OH)2 +2OH– E0 =0.49V Cd(OH)2 +2e– →Cd(s)+2OH– E0 =–0.81V a. What is the standard cell potential or voltage of this NiCd cell? b. Write the net chemical reaction in the direction of spontaneous reaction. Is cadmium oxidized or reduced? c. Write an expression for the reaction quotient Q. What is Q if the electrolyte concentrations are: [NiO2] = 1 M and [Cd(OH)2] = 0.01M and [Ni(OH)2] = 0.001...
5. The nickel-cadmium battery, despite issues with the toxicity of Cd, is still used in some...
5. The nickel-cadmium battery, despite issues with the toxicity of Cd, is still used in some rechargeable batteries because it has very consistent voltage over long discharge times. a) Using only half-cell reactions given in Table 16.1, write the overall reaction and give the highest AV° value possible for a NiCd battery. b) The actual half-cell reactions used in a Nicd battery are: Ca(OH)2(8) + 2e → Cds + 2OH(aq) (Vº = -0.86V) NiO(OH)) + H2O) +e Ni(OH)2(s) + OH(aq)...
can you please explain the answers 9. Based on the solubility rules, which one of the following compounds should be...
can you please explain the answers
9. Based on the solubility rules, which one of the following compounds should be insoluble in water? A) Na2SO4 B) BaSO4 C) CuSO4 D) MgSO4 E) Rb2SO4 10. Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O → Ca(OH)2 + Ni(OH)2 A) Cd B) Ni02 C) HO D) Ca(OH)2 E) Ni(OH)2 11. The oxidation number of Cl in CIO3 is A) -1 B) +7 D) +3 E) None of...
Which of the following expressions is the correct equilibrium-constant expression for the reaction below? 200(g) =...
Which of the following expressions is the correct equilibrium-constant expression for the reaction below? 200(g) = CO2(g) + C(s) A. [CO][C]/[CO] B. K [CO] C. [CO] / [CO2) D. [CO]/[CO] E. 2[CO] /[CO][C] In which of the following reactions would increasing pressure at constant temperature not change the concentrations of reactants and products, based on Le Châtelier's principle? ООООО A. 2N, () + 0,02N,0 () B. N.O. (g) 2NO, (g) C. N2(g) + 3H2(g)2NH3 (9) D. N2 (9) + 202...
Q(18) NI(CO)49) - Ni(s) + 4 CO(g)Adding nickel (solid) to this reaction will cause the equilibrium...
Q(18) NI(CO)49) - Ni(s) + 4 CO(g)Adding nickel (solid) to this reaction will cause the equilibrium to A) Shift toward the products B) Shift toward the reactants C) remain unchanged D) increase the temperature E) it depends on the amount added Q(19) CO2 + H2 -CO + H2O Adding a catalyst to this reaction will cause the COD at equilibrium to A) Shift toward the products B) Shift toward the reactants C) remain unchanged D) increase the temperature E) it...
please help ASAP One mole of ____ contains the least number of atoms. A) S_8 B)CH_4...
please help ASAP
One mole of ____ contains the least number of atoms. A) S_8 B)CH_4 C)Al_2(SO_4)_3 D)Na_3PO_4 E) C_6H_14 Which of these compounds is a weak electrolyte? A) NaCl B) HNO_3 C) C_6H_12O_6 (glucose) D) CH_3COOH (acetic acid) E) H_2SO_4 For the reaction shown below, which of the following is a conjugate acid-base pair? C_5H_5N(aq) + H_20(l) C_5H_5NH^+(aq) + OH^-(aq) A) C_5H_5N. H_2O B) C_5H_5N, C_5H_5N C) C_5H_5NH^+, OH^- D) H_2O. C^5H_5NH^+ E) H_2O, OH^- The reaction shown below...
8. For each of the following molecular formulas, determine how many atoms of each element are...
8. For each of the following molecular formulas, determine how many atoms of each element are present. a. Cr(OH)3 h. Ag2SO4 b. H2C204 i. HgCl2 C. S2Cl2 j. KCIO d. (NH4)2S k. Ca3(PO4)2 e. CuBr2 1. NH4ClO3 f. LINO3 m. Mg(MnO4)2 g. PFS n. Cr2(CO3)3 9. For each of the structural formulas, write the molecular formula. o=c=0 H-C-CE 6 H-cực-H H ه I-U- - H ه f. I H CICI -0 1 II Cl-Si-si-ci 0-0-I ن I -S-O-H O-H 0--0-H...
please explain why the answers are what they are. thank you 18. Which one of these...
please explain why the answers are what they are.
thank you
18. Which one of these molecules does not contain any stereogenic centers? 19. How do the two chemical structures shown in the box below compare to one another? a) They represent the same molecule. b) They are isotopes. (c) They are constitutional isomers. d) They have different chemical formulas. 23. Based on structural characteristics, predict which of these substances has the lowest melting point @woo woo Dance CH 3....
You don't have to write detailed answers, I just need the correct choice Thank you! 15....
You don't have to write detailed answers, I just need the
correct choice
Thank you!
15. Which statement is true if the reaction shown is spontaneous under standard conditions as written? Zn(s) + Cu2+(aq) -- Zn2+(aq) + Cu(s) (A) K is smaller than 1, 4Gº is positive, and Eº is negative. (B) K is smaller than 1, 4Gº is negative, and E° is positive. (C) K is larger than 1, 4Gº is negative, and E° is positive. (D) K is...
Please answer 6a through 6e. Thank you! 6. A 1.500 g sample of a mixture of...
Please answer 6a through 6e.
Thank you!
6. A 1.500 g sample of a mixture of solid Na PO:12H.O mixed with NaCl, was dissolved in water, reacted with aqueous 1 M SrCl, and 0.520 g Sr,(PO), precipitate was collected and dried to a constant mass. If the reagent tests demonstrated that Na,PO-12H0 was the limiting reactant in the precipitation reaction, calculate the mass percent of Na,PO-12H,O in the original sample. a. How many moles of Sr (PO), were produced? b....
5. The nickel-cadmium battery, despite issues with the toxicity of Cd, is still used in some rechargeable batteries because it has very consistent voltage over long discharge times. a) Using only half-cell reactions given in Table 16.1, write the overall reaction and give the highest AV° value possible for a NiCd battery. b) The actual half-cell reactions used in a Nicd battery are: Ca(OH)2(8) + 2e → Cds + 2OH(aq) (Vº = -0.86V) NiO(OH)) + H2O) +e Ni(OH)2(s) + OH(aq)...
can you please explain the answers
9. Based on the solubility rules, which one of the following compounds should be insoluble in water? A) Na2SO4 B) BaSO4 C) CuSO4 D) MgSO4 E) Rb2SO4 10. Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O → Ca(OH)2 + Ni(OH)2 A) Cd B) Ni02 C) HO D) Ca(OH)2 E) Ni(OH)2 11. The oxidation number of Cl in CIO3 is A) -1 B) +7 D) +3 E) None of...
Which of the following expressions is the correct equilibrium-constant expression for the reaction below? 200(g) = CO2(g) + C(s) A. [CO][C]/[CO] B. K [CO] C. [CO] / [CO2) D. [CO]/[CO] E. 2[CO] /[CO][C] In which of the following reactions would increasing pressure at constant temperature not change the concentrations of reactants and products, based on Le Châtelier's principle? ООООО A. 2N, () + 0,02N,0 () B. N.O. (g) 2NO, (g) C. N2(g) + 3H2(g)2NH3 (9) D. N2 (9) + 202...
Q(18) NI(CO)49) - Ni(s) + 4 CO(g)Adding nickel (solid) to this reaction will cause the equilibrium to A) Shift toward the products B) Shift toward the reactants C) remain unchanged D) increase the temperature E) it depends on the amount added Q(19) CO2 + H2 -CO + H2O Adding a catalyst to this reaction will cause the COD at equilibrium to A) Shift toward the products B) Shift toward the reactants C) remain unchanged D) increase the temperature E) it...
please help ASAP
One mole of ____ contains the least number of atoms. A) S_8 B)CH_4 C)Al_2(SO_4)_3 D)Na_3PO_4 E) C_6H_14 Which of these compounds is a weak electrolyte? A) NaCl B) HNO_3 C) C_6H_12O_6 (glucose) D) CH_3COOH (acetic acid) E) H_2SO_4 For the reaction shown below, which of the following is a conjugate acid-base pair? C_5H_5N(aq) + H_20(l) C_5H_5NH^+(aq) + OH^-(aq) A) C_5H_5N. H_2O B) C_5H_5N, C_5H_5N C) C_5H_5NH^+, OH^- D) H_2O. C^5H_5NH^+ E) H_2O, OH^- The reaction shown below...
8. For each of the following molecular formulas, determine how many atoms of each element are present. a. Cr(OH)3 h. Ag2SO4 b. H2C204 i. HgCl2 C. S2Cl2 j. KCIO d. (NH4)2S k. Ca3(PO4)2 e. CuBr2 1. NH4ClO3 f. LINO3 m. Mg(MnO4)2 g. PFS n. Cr2(CO3)3 9. For each of the structural formulas, write the molecular formula. o=c=0 H-C-CE 6 H-cực-H H ه I-U- - H ه f. I H CICI -0 1 II Cl-Si-si-ci 0-0-I ن I -S-O-H O-H 0--0-H...
please explain why the answers are what they are.
thank you
18. Which one of these molecules does not contain any stereogenic centers? 19. How do the two chemical structures shown in the box below compare to one another? a) They represent the same molecule. b) They are isotopes. (c) They are constitutional isomers. d) They have different chemical formulas. 23. Based on structural characteristics, predict which of these substances has the lowest melting point @woo woo Dance CH 3....
You don't have to write detailed answers, I just need the
correct choice
Thank you!
15. Which statement is true if the reaction shown is spontaneous under standard conditions as written? Zn(s) + Cu2+(aq) -- Zn2+(aq) + Cu(s) (A) K is smaller than 1, 4Gº is positive, and Eº is negative. (B) K is smaller than 1, 4Gº is negative, and E° is positive. (C) K is larger than 1, 4Gº is negative, and E° is positive. (D) K is...
Please answer 6a through 6e.
Thank you!
6. A 1.500 g sample of a mixture of solid Na PO:12H.O mixed with NaCl, was dissolved in water, reacted with aqueous 1 M SrCl, and 0.520 g Sr,(PO), precipitate was collected and dried to a constant mass. If the reagent tests demonstrated that Na,PO-12H0 was the limiting reactant in the precipitation reaction, calculate the mass percent of Na,PO-12H,O in the original sample. a. How many moles of Sr (PO), were produced? b....
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