Chemistry for Engineering Students
3rd Edition
ISBN: 9781285199023
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
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Chapter 4, Problem 4.20PAE
4.20 Assuming a charcoal briquette is composed entirely of carbon, what mass of oxygen is needed to completely burn a 37.3-g briquette?
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4.111. The burning of acetylene (C2H2) in oxygen is the reaction in the oxyacetylene torch. How many g of CO2 is produced by burning 20.0 kg of acetylene in an excess of O2? The unbalanced equation is:
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Chapter 4 Solutions
Chemistry for Engineering Students
Ch. 4 - Describe the chemical composition of gasoline.Ch. 4 - Write balanced chemical equations for the...Ch. 4 - Prob. 3COCh. 4 - Calculate the amounts of reactants needed in a...Ch. 4 - Prob. 5COCh. 4 - Prob. 6COCh. 4 - Prob. 7COCh. 4 - 4.1 List at least two factors that make it...Ch. 4 - 4.2 What is an alkane?Ch. 4 - 4.3 Explain the difference between complete and...
Ch. 4 - 4.4 Automobile exhaust often contains traces of...Ch. 4 - 4.5 Methane, ethane, and propane are also...Ch. 4 - 4.6 Use the web to research prices of gasoline at...Ch. 4 - For the following reactions, write the ratios that...Ch. 4 - 4.8 In an experiment carried out at very low...Ch. 4 - 4.9 Sulfur, S8, combines with oxygen at elevated...Ch. 4 - 4.10 How many moles of oxygen can be obtained by...Ch. 4 - 4.11 MTBE, C5H12O, is one of the additives that...Ch. 4 - 4.12 In petroleum refining, hydrocarbons are often...Ch. 4 - 4.13 For the following reactions, determine the...Ch. 4 - 4.14 The combustion of liquid chloroethylene,...Ch. 4 - 4.15 What mass of the unknown compound is formed...Ch. 4 - 4.16 Many metals react with halogens to give metal...Ch. 4 - 4.17 Phosgene is a highly toxic gas that has been...Ch. 4 - Prob. 4.18PAECh. 4 - 4.19 How many metric tons of carbon are required...Ch. 4 - 4.20 Assuming a charcoal briquette is composed...Ch. 4 - 4.21 Ammonium nitrate, NH4NO3, will decompose...Ch. 4 - If 3.4 mol Al and 6.2 mol Fe2O3 are mixed, what is...Ch. 4 - If 8.4 moles of disilane, Si2H6, is combined with...Ch. 4 - 4.22 Generally, an excess of O2 is needed for the...Ch. 4 - 4.23 In the reaction of arsenic with bromine,...Ch. 4 - 4.24 Ammonia gas can be prepared by the reaction...Ch. 4 - 4.25 When octane is combusted with inadequate...Ch. 4 - 4.26 The equation for one of the reactions in the...Ch. 4 - 4.27 Copper reacts with sulfuric acid according to...Ch. 4 - 4.28 One of the steps in the manufacture of nitric...Ch. 4 - 4.29 When Al(OH)3 reacts with sulfuric acid, the...Ch. 4 - 4.30 Copper reacts with nitric acid via the...Ch. 4 - 4.31 How much HNO3 can be formed in the following...Ch. 4 - 4.32 Hydrogen and oxygen are reacted and the water...Ch. 4 - 4.33 Silicon carbide, an abrasive, is made by the...Ch. 4 - Prob. 4.36PAECh. 4 - Prob. 4.37PAECh. 4 - 4.36 Sometimes students in chemistry labs...Ch. 4 - 4.37 The theoretical yield and the actual yield...Ch. 4 - 4.38 A reaction that produced 4.8 mg of taxol, an...Ch. 4 - Methanol, CH3OH, is used in racing cars because it...Ch. 4 - 4.40 When iron and steam react at high...Ch. 4 - 4.41 The percentage yield of the following...Ch. 4 - 4.42 Sulfur hexafluoride is a very stable gas...Ch. 4 - 4.43 Magnesium nitride forms in a side reaction...Ch. 4 - 4.44 Industrial production of hydrogen gas uses...Ch. 4 - 4.45 If 21 g of H2S is mixed with 38 g of O2 and...Ch. 4 - 4.46 A mixture of 10.0 g of NO and 14.0 g of NO2...Ch. 4 - 4.47 Silicon carbide is, an abrasive used in the...Ch. 4 - 4.48 Elemental phosphorous is used in the...Ch. 4 - 4.49 Small quantities of hydrogen gas can be...Ch. 4 - Prob. 4.52PAECh. 4 - 4.51 What is the role of an indicator in a...Ch. 4 - 4.52 What volume of 0.812 M HCl, in milliliters,...Ch. 4 - Prob. 4.55PAECh. 4 - Prob. 4.56PAECh. 4 - Hydrazine, N2H4, is a weak base and can react with...Ch. 4 - Prob. 4.58PAECh. 4 - Prob. 4.59PAECh. 4 - Prob. 4.60PAECh. 4 - 4.59 Aluminum dissolves in HCI according to the...Ch. 4 - 4.60 Why are fuel additives used?Ch. 4 - 4.61 What is actually measured by the octane...Ch. 4 - Prob. 4.64PAECh. 4 - Prob. 4.65PAECh. 4 - 4.64 Using the web, find information about the...Ch. 4 - 4.65 Using the web, find out how lead “poisons”...Ch. 4 - Prob. 4.68PAECh. 4 - You have 0.954 g of an unknown acid, H2A, which...Ch. 4 - Prob. 4.70PAECh. 4 - 4.79 Phosphoric add (H3PO4) is important in the...Ch. 4 - 4.80 The reaction shown below is used to destroy...Ch. 4 - Prob. 4.73PAECh. 4 - One way of determining blood alcohol levels is by...Ch. 4 - Prob. 4.75PAECh. 4 - The pictures below show a molecular-scale view of...Ch. 4 - The pictures below show a molecular-scale view of...Ch. 4 - 4.84 Aluminum chloride (AlCl3) is used as a...Ch. 4 - 4.85 In the cold vulcanization of rubber, disulfur...Ch. 4 - Prob. 4.80PAECh. 4 - Prob. 4.81PAECh. 4 - 4.88 A quality control technician needs to...Ch. 4 - Prob. 4.83PAECh. 4 - 4.90 Iron metal can be refined (rom the mineral...Ch. 4 - Prob. 4.85PAECh. 4 - Prob. 4.86PAECh. 4 - 4.93 A mixture of methane (CH4) and propane (C3H8)...Ch. 4 - Prob. 4.88PAECh. 4 - Prob. 4.89PAECh. 4 - Prob. 4.90PAECh. 4 - Prob. 4.91PAECh. 4 - Prob. 4.92PAECh. 4 - Prob. 4.93PAECh. 4 - Prob. 4.94PAECh. 4 - Prob. 4.95PAECh. 4 - Prob. 4.96PAECh. 4 - Prob. 4.97PAECh. 4 - 4.104 When 2.750 g of the oxide Pb3O4 is heated to...Ch. 4 - Prob. 4.99PAECh. 4 - 4.106 An ore sample with a mass of 670 kg contains...Ch. 4 - 4.107 Existing stockpiles of the refrigerant...Ch. 4 - 4.108 Elemental analysis is sometimes carried out...Ch. 4 - Prob. 4.103PAECh. 4 - 4.110 Write the balanced chemical equation lot the...Ch. 4 - 4.111 Aluminum metal reacts with sulfuric acid to...Ch. 4 - 4.112 A metallurgical firm wishes to dispose of...
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4.10 How many moles of oxygen can be obtained by the decomposition of 7.5 mol of reactant in each of the following reactions? 2KClO32KCl+3O2 2H2O22H2O+O2 2HgO2Hg+O2 2NaNO32NaNO2+O2 KClO4KCl+2O2
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Freon-12, CCl2F2, is prepared from CCl4 by reaction with HF. The other product of this reaction is HCl. Outline the steps needed to determine the percent yield of a reaction that produces 12.5 g of CCl2F2 from 32.9 g of Cd4. Freon-12 has been banned and is no longer used as a refrigerant because it catalyzes the decomposition of ozone and has a very long lifetime in the atmosphere. Determine the percent yield.
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High cost and limited availability of a reactant often dictate which reactant is limiting in a particular process. Identify the limiting reactant when the reactions below are run, and come up with a reason to support your decision. a. Burning charcoal on a grill: C(s)+O2(g)CO2(g) b. Burning a chunk of Mg in water: Mg(s)+2H2O(l)Mg(OH)2(aq)+H2(g) c. The Haber process of ammonia production: 3H2(g)+N2(g)2NH3(g)
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Write the balanced chemical equation for the complete combustion of adipic acid, an organic acid containing 49.31% C, 6.90% H, and the remainder O, by mass.
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4.21 Ammonium nitrate, NH4NO3, will decompose explosively to form N2, O2, and H2O, a fact that has been exploited in terrorist bombings. What mass of nitrogen is formed by the decomposition of 2.6 kg of ammonium nitrate?
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Methanol, CH3OH, is used in racing cars because it is a clean-burning fuel. It can be made by this reaction: CO(g)+2H2(g)CH3OH(l) What is the percentage yield if 5.0103gH2 reacts with excess CO to form 3.5104gCH3OH ?
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4.43 Magnesium nitride forms in a side reaction when magnesium metal burns in air. This reaction may also be carried out in pure nitrogen. 3Mg(s)+N2(g)Mg3N2(s) If 18.4 g of Mg3N2forms from the reaction of 20.0 g of magnesium with excess nitrogen, what is the percentage yield?
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Small quantities of oxygen gas can be generated in the laboratory by the decomposition of hydrogen peroxide. The unbalanced equation for the reaction is H2O2(uz/)-? H2O(/) + O2(g) Calculate the mass of oxygen produced when 10.00 g of hydrogen peroxide decomposes.
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4-93 Ammonia is prepared industrially by the reaction of nitrogen and hydrogen according to the following equation: If 29.7 kg of N2 is added to 3.31 kg of H2, (a) Which reactant is the limiting reagent? (b) How many grams of the other reactant are left over? (c) How many grams of NH3 are formed if the reaction goes to completion?
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When white phosphorus burns in air, it produces phosphorus(V) oxide. P4(s)+5O2(g)P4O10(s);H=3010kJ What is H for the following equation? P4O10(s)P4(s)+5O2(g)
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3.93 Adipic acid is used in the production of nylon, so it is manufactured in large quantities. The most common method for the preparation of adipic acid is the reaction of cyclohexane with oxygen. Balance the skeleton equation shown be1ow.
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How many O2 molecules are needed to react with 4.13 g of S?
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