Science
ChemistryChemistry for Engineering Students3.77 Answer each of the following questions. Note that none of them should require difficult calculations. (a) How many molecules are present in 1 mole of octane (C 4 H 1 8 )? (b) How many moles of fluorine atoms are present in 4 moles of C 2 F 6 ? (c) What is the approximate mass (to the nearest gram) of 3 × 10 2 3 carbon atoms?
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3.77 Answer each of the following questions. Note that none of them should require difficult calculations. (a) How many molecules are present in 1 mole of octane (C 4 H 1 8 )? (b) How many moles of fluorine atoms are present in 4 moles of C 2 F 6 ? (c) What is the approximate mass (to the nearest gram) of 3 × 10 2 3 carbon atoms?

BuyFind

Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
Publisher: Cengage Learning
ISBN: 9781337398909
BuyFind

Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
Publisher: Cengage Learning
ISBN: 9781337398909

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Section
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Problem 2CO
Problem 3CO
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Problem 5CO
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Chapter 3, Problem 3.77PAE
Textbook Problem

3.77 Answer each of the following questions. Note that none of

them should require difficult calculations.

(a) How many molecules are present in 1 mole of octane

(C4H18)?

(b) How many moles of fluorine atoms are present in 4

moles of C2F6?

(c) What is the approximate mass (to the nearest gram) of

3 × 1023 carbon atoms?

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Chapter 3 Solutions

Chemistry for Engineering Students
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Ch. 3 - • describe the chemical processes used in biomass...Ch. 3 - • explain balancing a chemical equation as an...Ch. 3 - list at least three quantities that must be...Ch. 3 - Write balanced chemical equations for simple...Ch. 3 - Explain the concept of a mole in your own words.Ch. 3 - Interpret chemical equations in terms of both...Ch. 3 - Interconvert between mass, number of molecules,...Ch. 3 - Determine a chemical formula from elemental...Ch. 3 - define the concentration of a solution and...Ch. 3 - Calculate the molarity of solutions prepared by...
Ch. 3 - Distinguish between electrolytes and...Ch. 3 - Describe the species expected to be present (ions,...Ch. 3 - recognize common strong acids and bases.Ch. 3 - write molecular and ionic equations for acidbase...Ch. 3 - Based on Figure 3.1, determine (a) the percentage...Ch. 3 - What are the chemical products of photosynthesis?...Ch. 3 - Jan Baptist von Helmont is credited with...Ch. 3 - A newspaper article states that biomass has...Ch. 3 - Figure 3.2 shows the production of ethanol as the...Ch. 3 - Define the terms reactants and products as they...Ch. 3 - Which symbols are used to indicate solids,...Ch. 3 - How is the addition of heat symbolized in a...Ch. 3 - What law of nature underpins the concept of a...Ch. 3 - 3.10 Define the term stoichiometric coefficient.Ch. 3 - 3.11 Balance these equations. (a) Al(s) + O2(g)(...Ch. 3 - 3.11 Balance the following equations. (a) CaC2(s)...Ch. 3 - 3.13 An explosive whose chemical formula is...Ch. 3 - 3.14 A number of compounds are used in cement, and...Ch. 3 - 3.15 Ethanol, C2H5OH is found in gasoline blends...Ch. 3 - 3.16 Balance the following equations. (a) reaction...Ch. 3 - 3.17 Write balanced chemical equations for the...Ch. 3 - 3.18 Diborane and related compounds were proposed...Ch. 3 - 3.19 Silicon nitride, Si3N4, is used as a...Ch. 3 - Prob. 3.21PAECh. 3 - Prob. 3.20PAECh. 3 - Prob. 3.23PAECh. 3 - Prob. 3.22PAECh. 3 - 3.24 Classify the following compounds as...Ch. 3 - 3.25 The following compounds are water-soluble....Ch. 3 - 3.26 Decide whether each of the following is...Ch. 3 - 3.27 The solubility of NaCl in water is 35.7 g...Ch. 3 - 3.28 A packaging engineer is working on a new...Ch. 3 - 3.29 Classify each of these as an acid or a base....Ch. 3 - 3.30 Define the term spectator ion.Ch. 3 - 3.31 What is the difference between a total ionic...Ch. 3 - 3.32 Balance the following equations and then...Ch. 3 - 3.33 Balance the following equations, and then...Ch. 3 - 3.34 In principle, it may be possible to engineer...Ch. 3 - 3.35 Explain the concept of the mole in your own...Ch. 3 - 3.36 How many entities are present in each of the...Ch. 3 - 3.37 If atypical grain of sand occupies a volume...Ch. 3 - 3.38 Estimate the size of a particle 1 mole of...Ch. 3 - 3.39 Calculate the molar mass of each of the...Ch. 3 - 3.40 Calculate the molar masses (in grams per...Ch. 3 - 3.41 Calculate the molar mass of each of these...Ch. 3 - 3.42 When an automobile air bag deploys, solid...Ch. 3 - 3.43 Calculate the molar mass of the following...Ch. 3 - 3.44 Determine the molar mass of these ceramic...Ch. 3 - A chemist needs exactly 2 moles of KNO3 to make a...Ch. 3 - 3.46 What mass of ozone (O3) contains 4.5 moles of...Ch. 3 - 3.47 Calculate the mass in grams of each the...Ch. 3 - 3.48 Calculate the mass in grams of 13.5 mol of...Ch. 3 - 3.49 How many moles are present in the given...Ch. 3 - 3.50 A test of an automobile engine's exhaust...Ch. 3 - 3.51 Modern instruments can measure a mass as...Ch. 3 - 3.52 How many H atoms are present in 7.52 g of...Ch. 3 - 3.53 How many O atoms are present in 214 g of...Ch. 3 - A sample of H2C2O4.2H2O of mass 3.35 g is heated...Ch. 3 - 3.55 An average person inhales roughly 2.5 g of O2...Ch. 3 - 3.56 A large family of boron-hydrogen compounds...Ch. 3 - Prob. 3.57PAECh. 3 - 3.58 Determine the simplest formulas of the...Ch. 3 - 3.59 The composition of materials such as alloys...Ch. 3 - 3.60 Copper can have improved wear resistance if...Ch. 3 - 3.61 Calculate the molarity of each of the...Ch. 3 - 3.62 What is the molarity of each ion present in...Ch. 3 - 3.63 How many moles of solute are present in each...Ch. 3 - 3.64 How many grams of solute are present in each...Ch. 3 - 3.65 Determine the final molarity for the...Ch. 3 - 3.66 Determine the initial volume (in mL) needed...Ch. 3 - 3.67 Commercially available concentrated sulfuric...Ch. 3 - 3.68 Magnesium is lighter than other structural...Ch. 3 - 3.69 Carbon dioxide is just one of many greenhouse...Ch. 3 - 3.70 Biomass production and use is a small...Ch. 3 - 3.71 What is meant by the term carbon reservoir?...Ch. 3 - 3.72 What is meant by the term carbon...Ch. 3 - 3.73 Explain how the burning of fossil fuels,...Ch. 3 - 3.74 Are most proposals to carry out carbon...Ch. 3 - 3.75 The following pictures show a molecular-scale...Ch. 3 - 3.76 What is an electrolyte? How can you...Ch. 3 - 3.77 Answer each of the following questions. Note...Ch. 3 - 3.78 Consider two samples of liquid: I mole of...Ch. 3 - 3.79 Consider two samples. Sample A contains 2...Ch. 3 - 3.80 Which one of the following metal samples...Ch. 3 - 3.81 The particulate scale drawing shown depicts...Ch. 3 - 3.82 The particulate scale drawing shown depicts...Ch. 3 - 3.83 For the reaction of nitrogen, N2, and...Ch. 3 - 3.84 The picture shown depicts the species present...Ch. 3 - 3.85 The particulate drawing shown represents an...Ch. 3 - 3.86 When a solution is diluted, solvent is added...Ch. 3 - 3.87 Nitric acid (HNO3) can be produced by the...Ch. 3 - 3.88 One Step in the enrichment of uranium for use...Ch. 3 - 3.89 Pyridine has the molecular formula C5H5N....Ch. 3 - 3.90 Pyrrole has the molecular formula C4H5N. When...Ch. 3 - 3.91 Hydrogen cyanide (HCN) is extremely toxic,...Ch. 3 - 3.92 Many chemical reactions take place in the...Ch. 3 - 3.93 Adipic acid is used in the production of...Ch. 3 - 3.94 Calcium carbonate (limestone, CaCO3)...Ch. 3 - 3.95 Cumene is a hydrocarbon, meaning that it...Ch. 3 - 3.96 Methyl cyanoacrylate is the chemical name for...Ch. 3 - 3.97 A low-grade form of iron ore is called...Ch. 3 - 3.98 The characteristic odor of decaying flesh is...Ch. 3 - 3.99 Iron—platinum alloys may be useful as...Ch. 3 - 3.100 Some aluminum—lithium alloys display the...Ch. 3 - 3.101 Which (if any) of the following compounds...Ch. 3 - 3.102 Classify the following compounds as acids or...Ch. 3 - 3.103 What is the mass in grams of solute in 250.0...Ch. 3 - 3.104 What volume of 0.123 M NaOH in milliliters...Ch. 3 - 3.105 Nitric acid is often sold and transported as...Ch. 3 - 3.106 Twenty-five mL of a 0.388 M solution of...Ch. 3 - 3.107 As computer processor speeds increase, it is...Ch. 3 - 3.108 As chip speeds increase, the width of the...Ch. 3 - 3.109 Materials engineers often create new alloys...Ch. 3 - 3.110 The protein that carries oxygen in the blood...Ch. 3 - 3.111 The chlorophyll molecule responsible for...Ch. 3 - 3.112 In one experiment, the burning of 0.614 g of...Ch. 3 - 3.113 MgCl2 is often found as an impurity in table...Ch. 3 - 3.114 Under the Clean Air Act, companies can...Ch. 3 - 3.115 The average person exhales 1.0 kg of carbon...Ch. 3 - 3.116 The simplest approximate chemical formula...Ch. 3 - 3.117 For the oxides of iron, FeO, Fe2O3, and...Ch. 3 - 3.118 Consider common sugars such as glucose...Ch. 3 - 3.119 For the compounds that commonly undergo...Ch. 3 - 3.120 1f you have 32.6 g of sodium carbonate that...Ch. 3 - 3.121 If you have 21.1 g of iron(II) nitrate that...Ch. 3 - 3.122 What type of reasoning were we using when we...Ch. 3 - 3.123 Most periodic tables provide molar masses...

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