CHEMISTRY:MOLECULAR NATURE (LL)W/ACCESS7th EditionJESPERSEN Publisher: WILEYISBN: 9781119497325
CHEMISTRY:MOLECULAR NATURE (LL)W/ACCESS
Solutions for CHEMISTRY:MOLECULAR NATURE (LL)W/ACCESS
Problem 1PE:
Practice Exercise 3.1
How many moles of aluminum are there in a 3.47 gram sheet of aluminum foil...Problem 2PE:
In a reaction to synthesize nitrogen triiodide. 0.023 mol of I2 are needed. How many grams need to...Problem 3PE:
Your laboratory balance can weigh samples to three decimal places. If the uncertainty in your...Problem 4PE:
How many atoms of gold are there in one ounce of gold? (Hint: How many grams are in an ounce?)Problem 6PE:
Most chemistry laboratories have balances that can weigh to the nearest milligram. Would it be...Problem 7PE:
Practice Exercise 3.7
Aluminum sulfate is analyzed, and the sample contains 0.0774 moles of sulfate...Problem 8PE:
How many moles of nitrogen atoms are combined with 8.60 mol of oxygen atoms in dinitrogen pentoxide?Problem 9PE:
Sodium bicarbonate is used to soften water. How many moles of oxygen atoms arc found in 1.29 moles...Problem 10PE:
How many grams of iron arc needed to combine with 25.6 g of O to make Fe2O3? (Hint.: Recall the mole...Problem 11PE:
Bromine trifluoride explodes upon contact with water. If a sample of bromine trifluoride has 0.163 g...Problem 12PE:
When 0.5462 g of a compound was decomposed. 0.2012 g of nitrogen and 0.3450 g of oxygen were...Problem 13PE:
An organic compound weighing 0.6672 g is decomposed, giving 0.3481 g carbon and 0.0870 g hydrogen....Problem 14PE:
Calculate the theoretical percentage composition of N2O. (Hint: Recall the definition of percentage...Problem 15PE:
Practice Exercise 3.15
Calculate the theoretical percentage compositions for . Which of these...Problem 16PE:
A 1.525 g sample of a compound between nitrogen and hydrogen contains 1.333 g of nitrogen....Problem 17PE:
Practice Exercise 3.17
Sulfur forms two different compounds with oxygen, . A 1.525 g sample of a...Problem 18PE:
Practice Exercise 3.18
A compound of nitrogen and iodine is an extremely sensitive contact explosive...Problem 19PE:
When aluminum it produced by electrolysis we get 5.68 tons of aluminum and 5.04 tons of oxygen. What...Problem 20PE:
A white solid used to whiten paper has the following percentage composition: Na, 32.4%; S. 22.6%....Problem 21PE:
Cinnamon gets some of its flavor from cinnamaldehyde that is 81.79% C, 6.10% H, and the rest is...Problem 24PE:
The empirical formula of hydrazine is NH2 and its molecular mass is 32.0. What is its molecular...Problem 25PE:
After determining that the empirical formulas of two different compounds were CH2C1andCHCl, a...Problem 26PE:
Practice Exercise 3.26
When aqueous solutions of barium nitrate, , and ammonium phosphate, , are...Problem 27PE:
Practice Exercise 3.27
Write the balanced chemical equation that describes what happens when a...Problem 28PE:
In the reaction 2SO2(g)+O2(g)2SO3(g), how many moles of O2 are needed to produce 6.76 moles of SO3?...Problem 29PE:
Practice Exercise 3.29
How many moles of sulfuric acid, H2SO4, are needed to react with by the...Problem 30PE:
Practice Exercise 3.30
Using the information in Example 3.16, calculate the mass of formed under...Problem 31PE:
How many grams of carbon dioxide are produced by the reaction described in Example 3.15?Problem 32PE:
Practice Exercise 3.32
The reaction between the limestone and hydrochloric acid produces carbon...Problem 33PE:
Practice Exercise 3.33
In an industrial process for making nitric acid, the first step is the...Problem 34PE:
Practice Exercise 3.34
In the synthesis of aspirin we react salicylic acid with acetic anhydride....Problem 35PE:
Practice Exercise 3.35
Ethanol, , can be converted to acetic acid (the acid in vinegar), , by the...Problem 36PE:
In producing a certain drug, one synthetic route involves three steps with percentage yields of...Problem 1RQ:
What is the definition of the mole?Problem 2RQ:
3.2 Why are moles used, when all stoichiometry problems could be done using only atomic mass...Problem 3RQ:
Which contains more molecules: 2.5molofH2Oor2.5molofH2? Which contains more atoms? Which weighs...Problem 4RQ:
How would Avogadros number change if the atomic mass unit were to be redefined as 21027 kg, exactly?Problem 5RQ:
3.5 What information is required to convert grams of a substance into molecules of that same...Problem 7RQ:
How many moles of iron atoms are in one mole of Fe2O3? How many iron atoms are in one mole of Fe2O3?Problem 8RQ:
Write all the mole-to-mole conversion factors that can be written based on the following chemical...Problem 9RQ:
What information is required to convert grams of a substance into moles of that same substance?Problem 10RQ:
Why is the expression 1.0 mol of oxygen ambiguous? Why doesnt a similar ambiguity exist in the...Problem 11RQ:
3.11 The atomic mass of aluminum is 26.98. What specific conversion factors does this value make...Problem 12RQ:
3.12 If you are given the mass of two elements and the mass of the compound for a sample, how can...Problem 14RQ:
In general, what fundamental information, obtained from experimental measurements, is required to...Problem 15RQ:
3.15 Why can percentage composition be used to determine empirical formula, but not molecular...Problem 17RQ:
3.17 Under what circumstances can we change, or assign, subscripts in a chemical formula?
Problem 18RQ:
How many distinct empirical formulas are shown by the following models for compounds formed between...Problem 19RQ:
3.19 When balancing a chemical reaction, what numbers can be changed? When balancing chemical...Problem 20RQ:
When given the unbalanced equation Na(s)+Cl2(g)NaCl(s) and asked to balance it, student A wrote...Problem 21RQ:
Give a step-by-step procedure for estimating the number of grams of A required to completely react...Problem 23RQ:
3.23 What information is required to determine how grams of sulfur would react with a gram of...Problem 24RQ:
A mixture of 0.020 mol of Mg and 0.020 mol of Cl2 reacted completely to form MgCl2 according to the...Problem 25RQ:
In a report to a supervisor, a chemist described an experiment in the following way: 0.0800 mol of...Problem 26RQ:
On April 16, 1947, in Texas City, Texas, two cargo ships, the Grandcamp and the High Flier, were...Problem 27RQ:
What is a limiting reactant? And why does the limiting reactant determine how much product is...Problem 28RQ:
Molecules containing A and B react to form AB as shown below. Based on the equations and the...Problem 31RQ:
3.31 Determine the mass in grams of each of die following:
(a) 1.35 mol Fe
(b) 24.5 mol O
(c) 0.876...Problem 32RQ:
Determine the mass in grams of the following: (a) 0.546 mol S (b) 3.29 mol N (c) 8.11 mol AlProblem 33RQ:
3.33 Calculate the formula mass of each of the following to the maximum number of significant...Problem 34RQ:
Calculate the formula mass of each of the following to the maximum number of significant figures...Problem 35RQ:
Calculate the mass in grams of the following. (a) 1.25molCa3(PO4)2 (b) 0.600molC4H10 (c) 0.625 mmol...Problem 36RQ:
What is the mass in grams of the following? (a) 0.322 mmol POCl3 (b) 4.3110-3mol(NH4)2HPO4 (c) 0.754...Problem 37RQ:
Calculate the number of moles of each compound in the following samples. (a) 1.56 ngNH3 (c) 21.5 g...Problem 38RQ:
Calculate the number of moles of each compound in the following samples. (a) 4.29gH2O2 (c) 9.36 g...Problem 39RQ:
How many moles of nickel are in 17.7 g of Ni?Problem 40RQ:
How many moles of chromium are in 85.7 g of Cr?Problem 43RQ:
3.43 A nanotechnology experiment requires atoms of potassium. What is the mass of this sample?
Problem 45RQ:
3.45 How many atoms are in 6.00 g of carbon-12?
Problem 46RQ:
How many atoms are in 1.50 mol of carbon-12? How many grams does this much carbon-12 weight?Problem 47RQ:
Sucrose (table sugar) has the formula C12H22O11. In this compound, what is the (a) atom ratio of C...Problem 48RQ:
Nail polish remover is usually the volatile liquid ethyl acetate, CH3COOC2H5. In this compound, what...Problem 49RQ:
3.79 How many moles of Bi atoms are needed to combine with 1.58 mol of O atoms to make ?
Problem 50RQ:
3.50 How many moles of vanadium atoms, V, are needed to combine with 0.565 mol of O atoms to make...Problem 51RQ:
How many moles of Cr are in 2.16 mol of Cr2O3?Problem 52RQ:
How many moles of O atoms are in 4.25 mol of calcium carbonate, CaCO3, the chief constituent of...Problem 53RQ:
Aluminum sulfate, Al2(SO4)3, is a compound used in sewage treatment plants to remove pollutants by...Problem 54RQ:
Magnetite is a magnetic iron ore. Its formula is Fe3O4. (a) Construct a pair of conversion factors...Problem 55RQ:
3.55 How many moles of H2andN2 can be formed by the decomposition of 0.145 mol of ammonia, NH3?Problem 57RQ:
3.57 How many moles of UF6 would have to be decomposed to provide enough fluorine to prepare 1.25...Problem 58RQ:
3.58 How many moles of Fe3O4 are required to supply enough iron to prepare 0.260 mol Fe2O3? (Assume...Problem 59RQ:
3.59 How many atoms of carbon are combined with 4.13 moles of hydrogen atoms in a sample of the...Problem 62RQ:
3.62 What is the total number of N, H, and O atoms in 0.356 mol of ammonium nitrate, , an important...Problem 63RQ:
3.63 Calcium carbide, CaC2, was once used to make signal flares for ships. Water dripped onto CaC2...Problem 64RQ:
3.64 Iodized salt contains a trace amount of calcium iodate, , to help prevent a thyroid condition...Problem 65RQ:
How many moles of nitrogen, N, are in 0.650 mol of ammonium carbonate? How many grams of this...Problem 66RQ:
3.66 How many moles of nitrogen, N, are in 0.556 mol of ammonium nitrate? How many grams of this...Problem 67RQ:
3.67 How many kilograms of a fertilizer made of pure (NH4)2CO3 would be required to supply 1...Problem 68RQ:
3.68 How many kilograms of a fertilizer made of pure P2O5 would be required to supply 1 kilogram of...Problem 70RQ:
Calculate the percentage composition by mass for each element in the following: (a) (CH3)2N2H2(c)...Problem 72RQ:
Which has a higher percentage of nitrogen: carbamaze-pine, an anticonvulsant, (C15HI2N2O) or...Problem 73RQ:
Freon is a trade name for a group of gaseous compounds once used as propellants in aerosol cans....Problem 75RQ:
It was found that 2.35 g of a compound of phosphorus and chlorine contained 0.539 g of phosphorus....Problem 77RQ:
Phencyclidine (angel dust) is C17H25N. A sample suspected of being this illicit drug was found to...Problem 78RQ:
The hallucinogenic drug LSD has the molecular formula C20H25N3O. One suspected sample contained...Problem 79RQ:
How many grams of O are combined with 7.141021 atoms of N in the compound dinitrogen pentoxide?Problem 81RQ:
Write empirical formulas for the following compounds. (a)S2Cl2(d)As2O6(b)C6H12O6(e)H2O2(c)NH3Problem 83RQ:
3.83 Radioactive sodium pertechnetate is used as a brainscanning agent in medicine. Quantitative...Problem 84RQ:
A sample of Freon was found to contain 0.423 g of C, 2.50 g of Cl, and 1.34 g of F. What is the...Problem 85RQ:
3.85 Cinnamic acid, a compound related to the flavor component of cinnamon, is carbon, hydrogen,...Problem 86RQ:
3.86 Vanillin, a compound used as a flavoring agent in food products, has the following percentage...Problem 87RQ:
A dry-cleaning fluid composed of only carbon and chlorine was found to be composed of 14.5% C and...Problem 88RQ:
One compound of mercury with a molar mass of 519 contains 77.26 Hg, 9.25 C, and 1.17 H (with the...Problem 89RQ:
When 0.684 g of an organic compound containing only carbon, hydrogen, and oxygen was burned in...Problem 91RQ:
3.91 When 6.853 mg of a sex hormone was burned in a combustion analysis, 19.73 mg of and 6.391 mg...Problem 92RQ:
When a sample of a compound in the vitamin D family was burned in a combustion analysis, 5.983 mg of...Problem 93RQ:
The following are empirical formulas and the masses per mole for three compounds. What are their...Problem 94RQ:
The following are empirical formulas and the masses per mole for three compounds. What are their...Problem 95RQ:
The compound described in Problem 3.91 was found to have a molecular mass of 290. What is its...Problem 96RQ:
3.96 The compound described in Problem 3.92 was found to have a molecular mass of 399. What is the...Problem 97RQ:
A sample of a compound of mercury and bromine with a mass of 0.389 g was found to contain 0.111 g...Problem 98RQ:
A 0.6662 g sample of antimonal saffron, which is a red pigment used in painting, was found to...Problem 99RQ:
A sample of a compound of C, H, N, and O, was found to have a percentage composition of...Problem 100RQ:
3.100 Strychnine, a deadly poison, has a formula mass of 334 and a percentage composition of and...Problem 102RQ:
Balance the following equations....Problem 103RQ:
Write the following as balanced chemical equations. (a) Calcium hydroxide reacts with hydrogen...Problem 104RQ:
3.104 Write the following as balanced chemical equations.
(a) Sulfur dioxide reacts with oxygen to...Problem 107RQ:
3.107 The balanced chemical equation for the combustion of propane, a common heating fuel, is
Draw...Problem 108RQ:
3.108 Draw a molecular-level diagram for the reaction in which sulfur dioxide reacts with molecular...Problem 109RQ:
3.109 Write the equation that expresses in acceptable chemical shorthand the following statement:...Problem 110RQ:
The conversion of one air pollutant, nitrogen monoxide, produced in vehicle engines, into another...Problem 111RQ:
A balanced chemical equation contains the term 2Ba(OH)28H2O. How many atoms of each element does...Problem 112RQ:
3.112 A balanced chemical equation contains the term “.” How many atoms of each element does this...Problem 113RQ:
3.113 Chlorine is used by textile manufacturers to bleach cloth.
Excess chlorine is destroyed by its...Problem 114RQ:
The octane in gasoline burns according to the following equation. 2C8H18+25O216CO2+18H2O (a) How...Problem 115RQ:
Propane burns according to the following equation: C3H8+5O23CO2+4H2O (a) How many grams of O2 are...Problem 117RQ:
The incandescent white of a fireworks display is caused by the reaction of phosphorus with O2 to...Problem 118RQ:
The combustion of butane, C4Hl0, produces carbon dioxide and water. When one sample of C4Hl0 was...Problem 119RQ:
In dilute nitric acid, HNO3, copper metal dissolves according to the following equation....Problem 120RQ:
3.120 The reaction of hydrazine, , with hydrogen peroxide, , has been used in rocket engines. One...Problem 121RQ:
Oxygen gas can be produced in the laboratory by decomposition of hydrogen peroxide (H2O2):...Problem 122RQ:
Oxygen gas can be produced in the laboratory by decomposition of potassium chlorate (KClO3):...Problem 123RQ:
Using the balanced equation 2C2H6S(g)+9O2(g)4CO2(g)+2CO2(g)+6H2O(g) determine the number of SO2...Problem 124RQ:
3.124 Using the balanced chemical equation in Problem 3.123 and the diagram below, determine what...Problem 125RQ:
The thermite reaction between powdered aluminum and iron(III) oxide, 2A1+Fe2O3A12O3+2Fe produces so...Problem 126RQ:
3.126 Ethanol is synthesized for industrial use by the following reaction, carried out at very high...Problem 127RQ:
3.127 Silver nitrate, , reacts with iron(III) chloride, to give silver chloride, , and iron(III)...Problem 128RQ:
Chlorine dioxide, ClO2, has been used as a disinfectant in air-conditioning systems. It reacts with...Problem 129RQ:
Some of the acid in acid rain is produced by the following reaction: 3NO2(g)+H2O(l)2HNO3(aq)+NO(g)...Problem 130RQ:
Phosphorus pentachloride reacts with water to give phosphoric acid and hydrogen chloride according...Problem 131RQ:
Barium sulfate, BaSO4, is made by the following reaction. Ba(NO3)2(aq)+Na2SO4(aq)BaSO4(s)+2NaNO3(aq)...Problem 133RQ:
Aluminum sulfate can be made by the following reaction. 2AlCl3(aq)+3H2SO4(aq)Al2(SO4)3(aq)+6HCl(aq)...Problem 134RQ:
3.134 The combustion of methyl alcohol in an abundant excess of oxygen follows the equation
When...Problem 137RQ:
Mercury is an environmental pollutant because it can be converted by certain bacteria into the...Problem 140RQ:
*3.140 A compound of Ca, C, N, and S was subjected to quantitative analysis and formula mass...Problem 141RQ:
3.141 Ammonium nitrate will detonate if ignited in the presence of certain impurities. The equation...Problem 142RQ:
A lawn fertilizer is rated as 6.00% nitrogen, meaning 6.00 g of N in 100 g of fertilizer. The...Problem 143RQ:
Nitrogen is the active ingredient in many quick-acting fertilizers. You are operating a farm of 1500...Problem 144RQ:
Based solely on the amount of available carbon, how many grams of sodium oxalate, Na2C2O4, could be...Problem 145RQ:
According to NASA, the space shuttles external fuel tank for the main propulsion system carries...Problem 146RQ:
For a research project, a student decided to test the effect of the lead(II) ion (Pb2+) on the...Problem 147RQ:
3.147 Chlorine atoms cause chain reactions in the stratosphere that destroy ozone that protects the...Problem 148RQ:
Lime, CaO, can be produced in two steps as shown in the equations below. If the percentage yield of...Problem 149RQ:
A newspaper story describing the local celebration of Mole Day on October 23 (selected for Avogadros...Problem 150RQ:
Suppose you had one mole of pennies and you were going to spend 500 million dollars each and every...Browse All Chapters of This Textbook
Chapter 0 - A Very Brief History Of ChemistrChapter 1 - Scientific MeasurementChapter 2 - Elements, Compounds, And The Periodic TableChapter 3 - The Mole And StoichiometryChapter 4 - Molecular View Of Reactions In Aqueous SolutionsChapter 5 - Oxidation–reduction ReactionChapter 6 - Energy And Chemical ChangeChapter 7 - The Quantum Mechanical AtomChapter 8 - The Basics Of Chemical BondingChapter 9 - Theories Of Bonding And Structure
Chapter 10 - Properties Of GasesChapter 11 - Intermolecular Attractions And The Properties Of Liquids And SolidsChapter 12 - Mixtures At The Molecular Level: Properties Of SolutionsChapter 13 - Chemical KineticChapter 14 - Chemical EquilibriumChapter 15 - Acids And Bases, A Molecular LookChapter 16 - Acid–base Equilibria In Aqueous SolutionsChapter 17 - Solubility And Simultaneous EquilibriaChapter 18 - ThermodynamicsChapter 19 - ElectrochemistryChapter 20 - Nuclear Reactions And Their Role In ChemistryChapter 21 - Metal ComplexesChapter 22 - Organic Compounds, Polymers, And Biochemicals
Sample Solutions for this Textbook
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Chapter 0, Problem 1PEChapter 1, Problem 1PEChapter 2, Problem 1PEChapter 3, Problem 1PEa) CaI2 CaI2 consists of calcium and iodine atoms. Calcium is in the group 2A and has a charge of 2+...Chapter 5, Problem 1PEGiven information: The pudding contains 140 Cal per serving. Nutritional calories are related to...Chapter 7, Problem 1PEChapter 8, Problem 1PE
Chapter 9, Problem 1PEGaseous molecules have a very weak force of attraction within them; therefore they are free to move...The graph is as: As the intensity of the attractive force is reduced constantly, the variation in...Chapter 12, Problem 1PEChapter 13, Problem 1PEChapter 14, Problem 1PEChapter 15, Problem 1PEGiven information: The molarity of the hydronium ion is 12 M. The moles of HCl in the solution is 12...Chapter 17, Problem 1PEChapter 18, Problem 1PEChapter 19, Problem 1PEGiven information: The rest mass of tennis ball is 57.7 g. The mass of the tennis ball is calculated...The most common oxidation state of silver Ag is +1 is when it loses one electron and becomes Ag+...a) The molecular formula of the given organic compound consists of 6 carbon atoms and 14 hydrogen...
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