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11 Question (3 points) @ See page 253 Use the data in the table below to...
Use the data in the table below to answer the following questions: Compound ΔΔH°f (kJ/mol) CH3NH2(l)...
Use the data in the table below to answer the following questions: Compound ΔΔH°f (kJ/mol) CH3NH2(l) –23.0 O2(g) 0.0 CO2(g) –393.5 NO2(g) 33.2 H2O(l) –285.8 Methanol and methylamine are both combustible fuels. How many grams of methylamine must be combusted to raise the temperature of 457 g of water from 20.0°C to 53.0°C? Assume that the transfer of heat from the flame to the water is 100% efficient. How many grams of carbon dioxide are produced in this combustion reaction?
11 Question (3 points) See page 243 Rocket Fuels The payload of a rocket Includes fuel...
11 Question (3 points) See page 243 Rocket Fuels The payload of a rocket Includes fuel and oxygen for combustion of the fuel, Reactions 1 and 2 describe the combustion of dimethylhydrazine and hydrogen, respectively. 1st attempt Part 1 (1 point) See Periodic Table See Hint Calculate the energy change for the below reaction in k per pound. (CH3)2NNH, (1) + 4H2O(g) - N,(s) + 4H2O(g) +200,() AH --1694k) КЛЬ We were unable to transcribe this image
Question (2 points) See page 22 1st attempt See Periodic Table See Hint If all of...
Question (2 points) See page 22 1st attempt See Periodic Table See Hint If all of the energy from burning 318.0 g of propane (A Hcomb.C3H8 --2220 kJ/mol) is used to heat water, how many liters of water can be heated from 20.0°C to 100.0°C? (Assume that the density of water is 1.00 g/ml) L of water < 07/11 D40 ENG 0 OF 11 QUESTIONS COMPLETED e here to search
11 Question (3 points) See page 247 Copper has been used for thousands of years, either...
11 Question (3 points) See page 247 Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently used today in the production of wires and cables. Copper can be obtained through smelting or recycling. Determine the energy associated with each of these processes in order to recycle 145 mol Cu The smelting of copper occurs by the balanced chemical equation: Cuo(4) + CO(g) – Cu(s) + CO,(g) where AH cuois -155...
03 Question (3 points) See page 181 Ifa nail made of elemental iron [Fe() is placed...
03 Question (3 points) See page 181 Ifa nail made of elemental iron [Fe() is placed in an aqueous solution of a soluble palladium(II) salt[Pdad, the nail will gradually disappear as the iron enters the solution Ferlag and palladium metal [Pda] forms. 1st attempt Part 1 (1.5 points) See Periodic Table Is this a redox equation? se one o Yes O No Part 2 (1.5 points) Balance and show the net ionic equation that describes this reaction
13 Question (3 points) The enthalpy change for a chemical reaction is the sum of the...
13 Question (3 points) The enthalpy change for a chemical reaction is the sum of the energy consumed in breaking bonds and the energy released during bond formation. One way to determine the overall energy change for a chemical reaction is to apply Hess's law to add together a group of reactions which can be arranged such that the chemical equations, when combined, give the overall equation we are trying to characterize Part 1 (1 point) Il See Periodic Table...
05 Question (2 points) a See page 404 Use the average bond energies in the text...
05 Question (2 points) a See page 404 Use the average bond energies in the text to estimate the enthalpy changes of the following reactions. 3rd attempt Part 1 (1 point) Feedback i See Periodic Table See Hint N2(g)+02(g) >2NO(g) kJ/mol Part 2 (1 point) Feedback
15 Question (3 points) e See page 648 In a study of the formation of NOx...
15 Question (3 points) e See page 648 In a study of the formation of NOx air pollution, a chamber heated to 2200°C was filled with air (.790 atm N2, 0.2 10 atm O2). What are the equilibrium partial pressures of N2, O2, and NO if Kp = 0.0520 for the following reaction: N2(8)+02(g) 2NO (g) 1st attempt See Periodic Table Part 1 (1 point) See Hint P(N2) = atm Part 2 (1 point) P(O2) atm See Hint Part 3...
20 Question (3 points) a See page 181 A method for determining the quantity of dissolved...
20 Question (3 points) a See page 181 A method for determining the quantity of dissolved oxygen in natural waters requires a series of redox reactions. Balancé the following chemical equations in that series under the conditions indicated 2nd attempt Part 1 (1 point) ll See Periodic Table See Hint In basic solution: Mn2+ (aq) +02(g) → MnO2(s) < 20/29 > 20 OF 29 QUESTIONS COMPLETED + VIEW SOLUTION , UBMIT 9 MacBook Pro
03 Question (3 points) a See page 2 Copper was one of the earliest metals used...
03 Question (3 points) a See page 2 Copper was one of the earliest metals used by humans, because it can be prepared from a wide variety of copper minerals such as cuprite (Cu2O), chalcocite (Cu2S,.and malachite[CuCo(OH)al. Balance the following reactions for converting these minerals into copper metal. Place a coefficient in each gray box. 1st attempt Part 1 (1point) Jal See Periodic Table a. Cu20(s)- C(s)→ Cu(s) + CO2(g)
11 Question (3 points) See page 243 Rocket Fuels The payload of a rocket Includes fuel and oxygen for combustion of the fuel, Reactions 1 and 2 describe the combustion of dimethylhydrazine and hydrogen, respectively. 1st attempt Part 1 (1 point) See Periodic Table See Hint Calculate the energy change for the below reaction in k per pound. (CH3)2NNH, (1) + 4H2O(g) - N,(s) + 4H2O(g) +200,() AH --1694k) КЛЬ We were unable to transcribe this image
Question (2 points) See page 22 1st attempt See Periodic Table See Hint If all of the energy from burning 318.0 g of propane (A Hcomb.C3H8 --2220 kJ/mol) is used to heat water, how many liters of water can be heated from 20.0°C to 100.0°C? (Assume that the density of water is 1.00 g/ml) L of water < 07/11 D40 ENG 0 OF 11 QUESTIONS COMPLETED e here to search
11 Question (3 points) See page 247 Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently used today in the production of wires and cables. Copper can be obtained through smelting or recycling. Determine the energy associated with each of these processes in order to recycle 145 mol Cu The smelting of copper occurs by the balanced chemical equation: Cuo(4) + CO(g) – Cu(s) + CO,(g) where AH cuois -155...
03 Question (3 points) See page 181 Ifa nail made of elemental iron [Fe() is placed in an aqueous solution of a soluble palladium(II) salt[Pdad, the nail will gradually disappear as the iron enters the solution Ferlag and palladium metal [Pda] forms. 1st attempt Part 1 (1.5 points) See Periodic Table Is this a redox equation? se one o Yes O No Part 2 (1.5 points) Balance and show the net ionic equation that describes this reaction
13 Question (3 points) The enthalpy change for a chemical reaction is the sum of the energy consumed in breaking bonds and the energy released during bond formation. One way to determine the overall energy change for a chemical reaction is to apply Hess's law to add together a group of reactions which can be arranged such that the chemical equations, when combined, give the overall equation we are trying to characterize Part 1 (1 point) Il See Periodic Table...
05 Question (2 points) a See page 404 Use the average bond energies in the text to estimate the enthalpy changes of the following reactions. 3rd attempt Part 1 (1 point) Feedback i See Periodic Table See Hint N2(g)+02(g) >2NO(g) kJ/mol Part 2 (1 point) Feedback
15 Question (3 points) e See page 648 In a study of the formation of NOx air pollution, a chamber heated to 2200°C was filled with air (.790 atm N2, 0.2 10 atm O2). What are the equilibrium partial pressures of N2, O2, and NO if Kp = 0.0520 for the following reaction: N2(8)+02(g) 2NO (g) 1st attempt See Periodic Table Part 1 (1 point) See Hint P(N2) = atm Part 2 (1 point) P(O2) atm See Hint Part 3...
20 Question (3 points) a See page 181 A method for determining the quantity of dissolved oxygen in natural waters requires a series of redox reactions. Balancé the following chemical equations in that series under the conditions indicated 2nd attempt Part 1 (1 point) ll See Periodic Table See Hint In basic solution: Mn2+ (aq) +02(g) → MnO2(s) < 20/29 > 20 OF 29 QUESTIONS COMPLETED + VIEW SOLUTION , UBMIT 9 MacBook Pro
03 Question (3 points) a See page 2 Copper was one of the earliest metals used by humans, because it can be prepared from a wide variety of copper minerals such as cuprite (Cu2O), chalcocite (Cu2S,.and malachite[CuCo(OH)al. Balance the following reactions for converting these minerals into copper metal. Place a coefficient in each gray box. 1st attempt Part 1 (1point) Jal See Periodic Table a. Cu20(s)- C(s)→ Cu(s) + CO2(g)
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