chapter 10 homework chem 111

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Chemistry

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Feb 20, 2024

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Chapter 10 Homework 1. Answer the questions using the following equation 4NH 3 + 5O 2 4 NO + 6 H 2 O a. How many moles of NH 3 will react with 95.3 moles of oxygen? 76.2 mol NH 3 b. How many moles of nitrogen monoxide will result from the reaction of 2.89 moles of ammonia (NH 3 )? 2.89 mol NO c. If 3.35 moles of water is produced, how many moles of nitrogen monoxide will also be produced? 2.23 mol NO 2. In our bodies, sugar (C 6 H 12 O 6 )is broken down by reacting with oxygen to produce water and carbon dioxide. a. Write the balanced chemical equation for this reaction. C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O b. How many moles of carbon dioxide will be formed upon the complete reaction of 0.424 moles of glucose sugar, C 6 H 12 O 6 and excess oxygen? 2.54 mol CO 2 3. Butane, C 4 H 10 , is a common fuel used for heating homes not served by natural gas. a. Write the balanced chemical equation for the combustion of butane. 2C 4 H 10 + 13O 2 8 CO 2 + 10 H 2 O b. How many grams of butane can be burned by 1.42 moles of oxygen? 12.7 g C 4 H 10 c. If 9.43 g of oxygen is used in burning butane, how many moles of water result? 0.227 mol H 2 O d. Calculate the number of grams of carbon dioxide that will be produced by burning 78.4 grams of butane. 238 g CO 2 e. How many grams of oxygen are used in a reaction that produces 43.8 grams of water? 101 g O 2 4. The explosion of nitroglycerine is described by the equation 4C 3 H 5 (NO 3 ) 3 12CO 2 + 10 H 2 O + 6N 2 + O 2 How many grams of carbon dioxide are produced by the explosion of 21.0 grams of nitroglycerine. 12.2 g CO 2 5. One way to make sodium thiosulfate (aka “hypo” used in photographis developing) is described by the equation Na 2 CO 3 + 2Na 2 S + 4SO 2 3Na 2 S 2 O 3 + CO 2 1
Chapter 10 Homework How many grams of sodium sulfide are required to produce 681 grams of sodium thiosulfate? 224g Na 2 S 6. If a sample contains 0.802 g of tetraphosphorus decoxide, how many grams of Fe 2 O 3 was used in making it? 12 P + 10 Fe 2 O 3 3P 4 O 10 + 20 Fe 1.50g Fe 2 O 3 7. How much NaCl (in grams) is needed to react completely with 83.0 grams of ammonium hydrogen carbonate. NaCl + NH 4 HCO 3 NaHCO 3 + NH 4 Cl 61.4g NaCl 8. What mass of magnesium hydroxide will precipitate if 2.09 grams of potassium hydroxide is added to a magnesium nitrate solution? (HINT: write a balanced reaction first) 2KOH + Mg(NO 3 ) 2 Mg(OH) 2 + 2KNO 3 ; 1.09g Mg(OH) 2 9. In a dry cell battery, zinc reacts with ammonium chloride to form zinc chloride, ammonia, and hydrogen. Calculate the number of grams of zinc consumed during the release of 7.05 grams of ammonia. (HINT: write a balanced reaction first) Zn + 2NH 4 Cl ZnCl 2 + 2NH 3 + H2; 13.5g Zn 10.3 Percent Yield 10. The function of “hypo” in photographic developing is to remove excess silver bromide by the reaction 2 Na 2 S 2 O 3 + AgBr Na 3 Ag(S 2 O 3 ) 2 + NaBr a. How many grams of sodium bromide will 8.18 grams of sodium thiosulfate produce? 2.66g NaBr b. What is the percent yield if the actual yield is 2.61 grams of sodium bromide? 98.1% 11. Using the following reaction 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 a. How many grams of glucose are produced from 7.03 grams of carbon dioxide? 4.80 g C 6 H 12 O 6 b. What is the percent yield if the actual yield is 3.92 grams of carbon dioxide? 81.7% 10.4 Limiting Reactants 2
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