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Question 35 (1 point) Which salt produces a basic...
help please asap please Question 36 (1 point) What is the pH of a buffer made...
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Question 36 (1 point) What is the pH of a buffer made by combining 0.114 M nitrous acid and 0.204 M sodium nitrite? The Ka of nitrous acid, HNO2, is 4.5*10-4 Your Answer: Answer Question 35 (1 point) Which salt produces a basic solution when dissolved in water? FeCl3 NaNO2 NH4Br KCI Question 34 (1 point) Between HCIO3 and HIO3, which is stronger and why? OHCIO3 is stronger because chlorine is more electronegative than iodine. HCIO3...
please help as soon as possible ergent Question 31 (1 point) A solution was made by...
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Question 31 (1 point) A solution was made by adding 87 g of ethanol, C2HOH, to 742 of water. How much would this lower the freezing point? The freezing point depression constant. Kt. of water is 1.86 °C-m-1 and the molar mass of ethanol is 46.08 g-mol-1. (Don't use the degree sign in your answer.) Your Answer: Answer units Question 32 (1 point) What is the pH of a 0.023 M aqueous acetic...
please help as soon as possible ergent Question 20 (1 point) What is the half-life of...
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Question 20 (1 point) What is the half-life of the radioactive isotope from the first-order decay plot below? 0. 03 concentration 0.5 03 0.2 0.1 . 20 40 60 80 100 120 140 160 180 200 time (hours) 70 hours 35 hours 60 hours 140 hours We were unable to transcribe this imageQuestion 18 (1 point) On the phase diagram, point A denotes the and with an increase in pressure at a constant...
please help as soon as possible ergent Question 45 (1 point) What is the cell potential...
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Question 45 (1 point) What is the cell potential (in V) for the reaction described by the cell notation shown below if the temperature is 25 °C? Show all work to be turned in. Work should include the balanced redox reaction. Ni (s) I Ni2+ (0.64 M) Il Cut (0.048 M) I Cu (s) 12 reaction Ered (V) Cut + e Cu +0.52 Your Answer: Ni2+ + 2e Ni -0.23 Answer DOLL
please help as soon as possible ergent Question 40 (1 point) Consulting the table of standard...
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Question 40 (1 point) Consulting the table of standard reduction potentials provided, which species is the best reducing agent? V reaction Ered (V) co2+ + e Co -0.28 Na* + e- Na -2.71 Осо3+ Na O Na Co Question 41 (1 point) sting of the Mn2/Mn and Cut/Cu half reactions. What Question 38 (1 point) Which base is the strongest? Base B. pkp = 3,45 Base A, Kp = 1.8x10-4 Base C. pkb...
please help as soon as possible ergent Question 44 (1 point) What is the standard Gibbs...
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Question 44 (1 point) What is the standard Gibbs free energy change for the reaction be 3 Ca2+ + 2 Au 2 AuJ+3 cd % reaction Erea (V) -1.50 Au. 3 Au Cd2+ + 2e-Cd -0.40 +637 kJ +367 kJ 0-637 kJ 0-367 kJ O+1.10 x 10 kg 0-1.10 x 103 kJ none of these Question 43 (1 point) Which of the following statements are FALSE about an electrochemical cell? (Select all that...
please help as soon as possible ergent Question 24 (1 point) A substance (A) reacts to...
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Question 24 (1 point) A substance (A) reacts to form another substance (B): 3 A(9) 2 B(9) The reaction is run at a particular temperature with the concentrations of A and B monitored over time and plotted in the graph. At what time was equilibrium first reached and what is the approximate value of the equilibrium constant? 2.0 16 [B] LO concentration/M 10 IA] 04 00 • 30 20 x 50 60 90...
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Question 12 (1 point) Which diagram best describes an aqueous solution of copper chloride (Cuci)? Water molecules are omitted for clarity matom anion cation Figure A 8 O Figure B Figure c Figure D စ္ဆ၀၉ Figure E Question 10 (1 point) For the process O2(9) 20(9), AH = 490 kJ mort What would be...
please help as soon as possible ergent please i dont have any question left to post...
please help as soon as possible ergent
please i dont have any question left to post if you help to
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The standard molar enthalpy of combustion of ethane (C2Helgy) is -1559 7 KJ mor 1. Which energy diagram corresponds to this process? Enthalpy 1559 Reaction coordinate 3559 Reaction coordinate Enthalpy -1559 Reaction coordinate Enthalpy -1559 Question 15 (1 point) What element is reduced and what is the reducing agent in the reaction below? Fe2O3(s)...
please help as soon as possible ergent Question 28 (1 point) What voltaic cell can be...
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Question 28 (1 point) What voltaic cell can be constructed to yield the most positive standard cell potential using the materials available in the table? 1/2 Reaction E° (V Cu2+ + 2 e Cu +0.34 Cr3+ + 3 e Cr -0.41 Ag+ + e Ag +0.80 - Ag|Ag (1.0 M)||Cr3+(1.0 M) Cr Cu Cu2+(1.0 M)||Ag (1.0 M)|Ag O Cr/Cr3+(1.0 M)||Ag*(1.0 M)|Ag O Cr/Cr3+(1.0 M)||Cu2+(1.0 M)||Cu Question 29 (1 point) formal charge on nitrogen...
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Question 36 (1 point) What is the pH of a buffer made by combining 0.114 M nitrous acid and 0.204 M sodium nitrite? The Ka of nitrous acid, HNO2, is 4.5*10-4 Your Answer: Answer Question 35 (1 point) Which salt produces a basic solution when dissolved in water? FeCl3 NaNO2 NH4Br KCI Question 34 (1 point) Between HCIO3 and HIO3, which is stronger and why? OHCIO3 is stronger because chlorine is more electronegative than iodine. HCIO3...
please help as soon as possible ergent
Question 31 (1 point) A solution was made by adding 87 g of ethanol, C2HOH, to 742 of water. How much would this lower the freezing point? The freezing point depression constant. Kt. of water is 1.86 °C-m-1 and the molar mass of ethanol is 46.08 g-mol-1. (Don't use the degree sign in your answer.) Your Answer: Answer units Question 32 (1 point) What is the pH of a 0.023 M aqueous acetic...
please help as soon as possible ergent
Question 20 (1 point) What is the half-life of the radioactive isotope from the first-order decay plot below? 0. 03 concentration 0.5 03 0.2 0.1 . 20 40 60 80 100 120 140 160 180 200 time (hours) 70 hours 35 hours 60 hours 140 hours We were unable to transcribe this imageQuestion 18 (1 point) On the phase diagram, point A denotes the and with an increase in pressure at a constant...
please help as soon as possible ergent
Question 45 (1 point) What is the cell potential (in V) for the reaction described by the cell notation shown below if the temperature is 25 °C? Show all work to be turned in. Work should include the balanced redox reaction. Ni (s) I Ni2+ (0.64 M) Il Cut (0.048 M) I Cu (s) 12 reaction Ered (V) Cut + e Cu +0.52 Your Answer: Ni2+ + 2e Ni -0.23 Answer DOLL
please help as soon as possible ergent
Question 40 (1 point) Consulting the table of standard reduction potentials provided, which species is the best reducing agent? V reaction Ered (V) co2+ + e Co -0.28 Na* + e- Na -2.71 Осо3+ Na O Na Co Question 41 (1 point) sting of the Mn2/Mn and Cut/Cu half reactions. What Question 38 (1 point) Which base is the strongest? Base B. pkp = 3,45 Base A, Kp = 1.8x10-4 Base C. pkb...
please help as soon as possible ergent
Question 44 (1 point) What is the standard Gibbs free energy change for the reaction be 3 Ca2+ + 2 Au 2 AuJ+3 cd % reaction Erea (V) -1.50 Au. 3 Au Cd2+ + 2e-Cd -0.40 +637 kJ +367 kJ 0-637 kJ 0-367 kJ O+1.10 x 10 kg 0-1.10 x 103 kJ none of these Question 43 (1 point) Which of the following statements are FALSE about an electrochemical cell? (Select all that...
please help as soon as possible ergent
Question 24 (1 point) A substance (A) reacts to form another substance (B): 3 A(9) 2 B(9) The reaction is run at a particular temperature with the concentrations of A and B monitored over time and plotted in the graph. At what time was equilibrium first reached and what is the approximate value of the equilibrium constant? 2.0 16 [B] LO concentration/M 10 IA] 04 00 • 30 20 x 50 60 90...
please help as soon as possible ergent
please i dont have any question left to post if you help to
answer all will be so thankful
Question 12 (1 point) Which diagram best describes an aqueous solution of copper chloride (Cuci)? Water molecules are omitted for clarity matom anion cation Figure A 8 O Figure B Figure c Figure D စ္ဆ၀၉ Figure E Question 10 (1 point) For the process O2(9) 20(9), AH = 490 kJ mort What would be...
please help as soon as possible ergent
please i dont have any question left to post if you help to
answer all will be so thankful
The standard molar enthalpy of combustion of ethane (C2Helgy) is -1559 7 KJ mor 1. Which energy diagram corresponds to this process? Enthalpy 1559 Reaction coordinate 3559 Reaction coordinate Enthalpy -1559 Reaction coordinate Enthalpy -1559 Question 15 (1 point) What element is reduced and what is the reducing agent in the reaction below? Fe2O3(s)...
please help as soon as possible ergent
Question 28 (1 point) What voltaic cell can be constructed to yield the most positive standard cell potential using the materials available in the table? 1/2 Reaction E° (V Cu2+ + 2 e Cu +0.34 Cr3+ + 3 e Cr -0.41 Ag+ + e Ag +0.80 - Ag|Ag (1.0 M)||Cr3+(1.0 M) Cr Cu Cu2+(1.0 M)||Ag (1.0 M)|Ag O Cr/Cr3+(1.0 M)||Ag*(1.0 M)|Ag O Cr/Cr3+(1.0 M)||Cu2+(1.0 M)||Cu Question 29 (1 point) formal charge on nitrogen...
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