J9 cmsingi eltha noitulos eucoupe M 00 ebixonbyr Oxidation-Reduction Stoichiometry PL sin (1)ego to 1. When 50.0 mL of a 0.500 M copper (II) sulfate solution is mixed with 1.56 grams of aluminum. Write the balanced equation. +2 2 Al (s) + 3 Cu²² (50₁j ²) (aq) → +3 2 Al±³ (sou³) 3 (aq) +3 Cu (s) b. What mass of copper is produced? C. How much excess reactant remains at the end of the reaction? hero erit we s(OM)=8 to uxim tubong art we 10 sen edr prie US ups 2. Throwing some scrap iron in a gold nitrate solution causes the gold metal to precipitate. What volume 0.50 M gold nitrate solution would react with 224 grams of iron metal? 3 Fe(s) + 2 Au(NO3)3(aq) 3 Fe(NO3)2(aq) + 2 Au (s) 3. How many ml of 2.50 M HNO3 contain enough nitric acid to dissolve an old copper penny with a mass of 3.94 grams? 0.002 w pr 3 Cu(s) + 8 HNO3(aq) 3 Cu(NO3)2(aq) + 2 NO(g) + 4 H20(1) rit onial (CM) to noiule M 00 is to Jm As 4. In the oxidation of silver, if 45.0 grams of silver sulfide is produced from excess exposure to sulfur containing compounds, how much silver tarnished? YOX

J9 cmsingi eltha noitulos eucoupe M 00 ebixonbyr Oxidation-Reduction Stoichiometry PL sin (1)ego to 1. When 50.0 mL of a 0.500 M copper (II) sulfate solution is mixed with 1.56 grams of aluminum. Write the balanced equation. +2 2 Al (s) + 3 Cu²² (50₁j ²) (aq) → +3 2 Al±³ (sou³) 3 (aq) +3 Cu (s) b. What mass of copper is produced? C. How much excess reactant remains at the end of the reaction? hero erit we s(OM)=8 to uxim tubong art we 10 sen edr prie US ups 2. Throwing some scrap iron in a gold nitrate solution causes the gold metal to precipitate. What volume 0.50 M gold nitrate solution would react with 224 grams of iron metal? 3 Fe(s) + 2 Au(NO3)3(aq) 3 Fe(NO3)2(aq) + 2 Au (s) 3. How many ml of 2.50 M HNO3 contain enough nitric acid to dissolve an old copper penny with a mass of 3.94 grams? 0.002 w pr 3 Cu(s) + 8 HNO3(aq) 3 Cu(NO3)2(aq) + 2 NO(g) + 4 H20(1) rit onial (CM) to noiule M 00 is to Jm As 4. In the oxidation of silver, if 45.0 grams of silver sulfide is produced from excess exposure to sulfur containing compounds, how much silver tarnished? YOX

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 38CR

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A rebreathing gas mask contains potassium superoxide, KO2, which reacts with moisture in the breath to give oxygen. 4KO2(s)+2H2O(l)4KOH(s)+3O2(g) Estimate the grams of potassium superoxide required to supply a persons oxygen needs for one hour. Assume a person requires 1.00 102 kcal of energy for this time period. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 1.00 102 kcal of heat, calculate the amount of oxygen consumed and hence the amount of KO2 required. The ff0 for glucose(s) is 1273 kJ/mol.
On Easter Sunday, April 3, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized with sodium carbonate: 2HNO3(aq)+Na2CO3(aq)2NaNO3(aq)+H2O(l)+CO2(g) a. Calculate H for this reaction. Approximately 2.0 104 gal nitric acid was spilled. Assume that the acid was an aqueous solution containing 70.0% HNO3 by mass with a density of 1.42 glcm3. What mass of sodium carbonate was required for complete neutralization of the spill, and what quantity of heat was evolved? (Hf for NaNO3(aq) = 467 kJ/mol) b. According to The Denver Post for April 4, 1983, authorities feared that dangerous air pollution might occur during the neutralization. Considering the magnitude of H, what was their major concern?
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4-77 To convert 1 mol of iron(III) oxide to its elements requires 196.5 kcal: How many grams of iron can be produced if 156.0 kcal of heat is absorbed by a large-enough sample of iron(III) oxide?
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