Enter your answer in the provided box. One of the half-reactions for the electrolysis of water...
Enter your answer in the provided box. One of the half-reactions for the electrolysis of water is 2H2O(l) → O2(g) + 4H+(aq) + 4e− If 2.926 L of O2 is collected at 25°C and 755 mmHg, how many faradays of electricity had to pass through the solution?
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Enter your answer in the provided box. One of the half-reactions
for the electrolysis of water...
3. (a) Liquid H2O is subjected to electrolysis. One of the half-reactions is 2 H2O →...
3. (a) Liquid H2O is subjected to electrolysis. One of the half-reactions is 2 H2O → 02 (g) + 4H+ (aq) + 4 e How many faradays of electricity are required to produce 4.00 L of O, at 759 torr and 27 °C? (b) If a current of 4.25 A is used, how many hours will it take to carry out the electrolysis in part (a)?
(a) Molten NaF is subjected to electrolysis. One of the half-reactions is 2 F- → 2...
(a) Molten NaF is subjected to electrolysis. One of the half-reactions is 2 F- → 2 e- + F2 (g) How many faradays of electricity are required to produce 4.26 L of F2 at 742 torr and 20 °C? (b) If a current of 2.25 A is used, how many hours will it take to carry out the electrolysis in part (a)?
Refer to this table of reduction potentials to answer the questions. Reduction half-reaction Potential (V) +2.87...
Refer to this table of reduction potentials to answer the questions. Reduction half-reaction Potential (V) +2.87 Electrolytic cells use electricity to cause a nonspontaneous redox reaction to occur. An electrolytic cell is constructed using the following components: • a power source, such as a battery, • the substance that will undergo electrolysis, and • two inert electrodes (usually platinum), which serve as the electrical connection between the power source and the substance undergoing electrolysis. As with any cell, oxidation occurs...
A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential O2...
A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential O2 (g) + 4H+ (aq) +4e− → 2H2O (l) =E0red+1.23V Zn+2 (aq) +2e− → Zn (s) =E0red−0.763V Answer the following questions about this cell. Write a balanced equation for the half-reaction that happens at the cathode. Write a balanced equation for the half-reaction that happens at the anode. Write a balanced equation for the overall reaction that powers the cell. Be sure the reaction is...
Enter your answer in the provided box. How many grams of sucrose (C12H22O11) must be added...
Enter your answer in the provided box. How many grams of sucrose (C12H22O11) must be added to 677 g of water to give a solution with a vapor pressure 0.787 mmHg less than that of pure water at 20°C? (The vapor pressure of water at 20°C is 17.5 mmHg.)
Enter your answer in the provided box. A 1.70−g sample of water is injected into an...
Enter your answer in the provided box. A 1.70−g sample of water is injected into an evacuated 4.50−L flask at 50.0C. What percentage of water will be vapor when the system reaches equilibrium? Assume ideal behavior of water vapor and that the volume of liquid water is negligible. The vapor pressure of water at 50.0°C is 92.5 mmHg.
Enter your answer in the provided box. Consider the reaction 2Na(s) + 2H2O(1) 2NaOH(aq) + H2)...
Enter your answer in the provided box. Consider the reaction 2Na(s) + 2H2O(1) 2NaOH(aq) + H2) When 2 moles of Na react with water at 25°C and 1 atm, the volume of H2 formed is 24.5 L. Calculate the magnitude of work done in joules when 0.25 g of Na reacts with water under the same conditions. (The conversion factor is 1 L atm = 101.3 J.) J
Enter your answer in the provided box. A 2.70-g sample of water is injected into an...
Enter your answer in the provided box. A 2.70-g sample of water is injected into an evacuated 4.50-L flask at 70.0°C. What percentage of water will be vapor when the system reaches equilibrium? Assume ideal behavior of water vapor and that the volume of liquid water is negligible. The vapor pressure of water at 70.0°C is 233.7 mmHg. 30 rcent
Enter your answer in the provided box. What mass of insulin must be dissolved in 39.0...
Enter your answer in the provided box. What mass of insulin must be dissolved in 39.0 mL of water to produce a solution with an osmotic pressure of 16.1 mmHg at 25°C? The molar mass of insulin is 5808 g/mol. answer in g.
5.) Enter your answer in the provided box. Calculate the following quantity: volume of 1.551 M...
5.) Enter your answer in the provided box. Calculate the following quantity: volume of 1.551 M copper(II) nitrate that must be diluted with water to prepare 946.4 mL of a 0.9513 M solution. __?___ mL 6.) . Enter your answer in the provided box. How many milliliters of 0.836 M HCl are needed to react with 28.8 g of CaCO3? 2HCl(aq) + CaCO3(s) → CaCl2(aq) + CO2(g) + H2O(l) __?__ mL 7.) . Enter your answer in the provided box. Sodium...
3. (a) Liquid H2O is subjected to electrolysis. One of the half-reactions is 2 H2O → 02 (g) + 4H+ (aq) + 4 e How many faradays of electricity are required to produce 4.00 L of O, at 759 torr and 27 °C? (b) If a current of 4.25 A is used, how many hours will it take to carry out the electrolysis in part (a)?
Refer to this table of reduction potentials to answer the questions. Reduction half-reaction Potential (V) +2.87 Electrolytic cells use electricity to cause a nonspontaneous redox reaction to occur. An electrolytic cell is constructed using the following components: • a power source, such as a battery, • the substance that will undergo electrolysis, and • two inert electrodes (usually platinum), which serve as the electrical connection between the power source and the substance undergoing electrolysis. As with any cell, oxidation occurs...
Enter your answer in the provided box. Consider the reaction 2Na(s) + 2H2O(1) 2NaOH(aq) + H2) When 2 moles of Na react with water at 25°C and 1 atm, the volume of H2 formed is 24.5 L. Calculate the magnitude of work done in joules when 0.25 g of Na reacts with water under the same conditions. (The conversion factor is 1 L atm = 101.3 J.) J
Enter your answer in the provided box. A 2.70-g sample of water is injected into an evacuated 4.50-L flask at 70.0°C. What percentage of water will be vapor when the system reaches equilibrium? Assume ideal behavior of water vapor and that the volume of liquid water is negligible. The vapor pressure of water at 70.0°C is 233.7 mmHg. 30 rcent
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