Chemistry: A Molecular Approach, Books a la Carte Edition (4th Edition)
4th Edition
ISBN: 9780134113593
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 6, Problem 29E
Interpretation Introduction
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14:40 A
Candidate Identification
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13. The compound 1-bromo-hex-2-ene
reacts with methanol to form two
products. About this reaction, mark the
correct statement:
OCH3
CH3OH
Br
OCH3 +
+ HBr
A
B
A) The two products formed will have
the same percentage of formation.
B) Product B will be formed by SN1
substitution reaction with the formation
of an allylic carbocation.
C) Product A will be formed by SN1
substitution reaction with the formation
of a more stable carbocation than
product B.
D) Product A will be formed by an SN2
substitution reaction occurring in two
stages, the first with slow kinetics and
the second with fast kinetics.
E) The two compounds were obtained
by addition reaction, with compound B
having the highest percentage of
formation.
57
--
☑
14:30 A
Candidate Identification
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10. Amoxicillin (figure X) is one of the
most widely used antibiotics in the
penicillin family. The discovery and
synthesis of these antibiotics in the 20th
century made the treatment of infections
that were previously fatal routine.
About amoxicillin, mark the correct one:
HO
NH2 H
S
-N.
HO
Figura X. Amoxicilina
A) It has the organic functions amide,
ester, phenol and amine.
B) It has four chiral carbons and 8
stereoisomers.
C) The substitution of the aromatic ring
is of the ortho-meta type.
D) If amoxicillin reacts with an alcohol it
can form an ester.
E) The structure has two tertiary
amides.
62
The environmental police of a Brazilian state received a report of contamination of a river by inorganic arsenic, due to the excessive use of pesticides on a plantation on the riverbanks. Arsenic (As) is extremely toxic in its many forms and oxidation states. In nature, especially in groundwater, it is found in the form of arsenate (AsO ₄ ³ ⁻ ), which can be electrochemically reduced to As ⁰ and collected at the cathode of a coulometric cell. In this case, Potentiostatic Coulometry (at 25°C) was performed in an alkaline medium (pH = 7.5 throughout the analysis) to quantify the species. What potential (E) should have been selected/applied to perform the analysis, considering that this is an exhaustive electrolysis technique (until 99.99% of all AsO ₄ ³ ⁻ has been reduced to As ⁰ at the electrode, or n( final) = 0.01% n( initial )) and that the concentration of AsO ₄ ³ ⁻ found in the initial sample was 0.15 mmol/L ?
Data:
AsO ₄ 3 ⁻ (aq) + 2 H ₂ O ( l ) + 2 e ⁻ → A s O ₂ ⁻ ( a…
Chapter 6 Solutions
Chemistry: A Molecular Approach, Books a la Carte Edition (4th Edition)
Ch. 6 - A chemical system produces 155 kJ of heat and does...Ch. 6 - Q2. Which sample is most likely to undergo the...Ch. 6 - Prob. 3SAQCh. 6 - Q4. A 12.5-g sample of granite initially at 82.0...Ch. 6 - Q5. A cylinder with a moving piston expands from...Ch. 6 - Prob. 6SAQCh. 6 - Q7. Hydrogen gas reacts with oxygen to form...Ch. 6 - Prob. 8SAQCh. 6 - Prob. 9SAQCh. 6 - Prob. 10SAQ
Ch. 6 - Prob. 11SAQCh. 6 - Prob. 12SAQCh. 6 - Prob. 13SAQCh. 6 - Prob. 14SAQCh. 6 - Q15. Natural gas burns in air to form carbon...Ch. 6 - 1. What is thermochemistry? Why is it important?
Ch. 6 - 2. What is energy? What is work? List some...Ch. 6 - Prob. 3ECh. 6 - 4. State the law of conservation of energy. How...Ch. 6 - Prob. 5ECh. 6 - 6. State the first law of thermodynamics. What are...Ch. 6 - Prob. 7ECh. 6 - 8. What is a state function? List some examples of...Ch. 6 - 9. What is internal energy? Is internal energy a...Ch. 6 - 10. If energy flows out of a chemical system and...Ch. 6 - 11. If the internal energy of the products of a...Ch. 6 - 12. What is heat? Explain the difference between...Ch. 6 - 13. How is the change in internal energy of a...Ch. 6 - 14. Explain how the sum of heat and work can be a...Ch. 6 - 15. What is heat capacity? Explain the difference...Ch. 6 - 16. Explain how the high specific heat capacity of...Ch. 6 - 17. If two objects, A and B, of different...Ch. 6 - 18. What is pressure–volume work? How is it...Ch. 6 - 19. What is calorimetry? Explain the difference...Ch. 6 - 20. What is the change in enthalpy (ΔH) for a...Ch. 6 - 21. Explain the difference between an exothermic...Ch. 6 - 22. From a molecular viewpoint, where does the...Ch. 6 - 23. From a molecular viewpoint, where does the...Ch. 6 - 24. Is the change in enthalpy for a reaction an...Ch. 6 - Prob. 25ECh. 6 - Prob. 26ECh. 6 - 27. What is a standard state? What is the standard...Ch. 6 - Prob. 28ECh. 6 - 29. How do you calculate from tabulated standard...Ch. 6 - Prob. 30ECh. 6 - 31. What are the main environmental problems...Ch. 6 - Prob. 32ECh. 6 - Prob. 33ECh. 6 - Prob. 34ECh. 6 - Prob. 35ECh. 6 - 36. A particular frost-free refrigerator uses...Ch. 6 - 37. Which statement is true of the internal energy...Ch. 6 - Prob. 38ECh. 6 - 39. Identify each energy exchange as primarily...Ch. 6 - 40. Identify each energy exchange as primarily...Ch. 6 - 41. A system releases 622 kJ of heat and does 105...Ch. 6 - 42. A system absorbs 196 kJ of heat and the...Ch. 6 - 43. The gas in a piston (defined as the system)...Ch. 6 - Prob. 44ECh. 6 - Prob. 45ECh. 6 - Prob. 46ECh. 6 - 47. How much heat is required to warm 1.50 L of...Ch. 6 - 48. How much heat is required to warm 1.50 kg of...Ch. 6 - 49. Suppose that 25 g of each substance is...Ch. 6 - 50. An unknown mass of each substance, initially...Ch. 6 - 51. How much work (in J) is required to expand the...Ch. 6 - Prob. 52ECh. 6 - 53. The air within a piston equipped with a...Ch. 6 - 54. A gas is compressed from an initial volume of...Ch. 6 - 55. When 1 mol of a fuel burns at constant...Ch. 6 - 56. The change in internal energy for the...Ch. 6 - 57. Determine whether each process is exothermic...Ch. 6 - 58. Determine whether each process is exothermic...Ch. 6 - 59. Consider the thermochemical equation for the...Ch. 6 - 60. What mass of natural gas (CH4) must burn to...Ch. 6 - Prob. 61ECh. 6 - Prob. 62ECh. 6 - Prob. 63ECh. 6 - Prob. 64ECh. 6 - 65. A silver block, initially at 58.5 °C, is...Ch. 6 - Prob. 66ECh. 6 - 67. A 31.1-g wafer of pure gold, initially at 69.3...Ch. 6 - Prob. 68ECh. 6 - Prob. 69ECh. 6 - 70. A 2.74-g sample of a substance suspected of...Ch. 6 - 71. Exactly 1.5 g of a fuel burns under conditions...Ch. 6 - 72. In order to obtain the largest possible amount...Ch. 6 - 73. When 0.514 g of biphenyl (C12H10) undergoes...Ch. 6 - Prob. 74ECh. 6 - 75. Zinc metal reacts with hydrochloric acid...Ch. 6 - Prob. 76ECh. 6 - 77. For each generic reaction, determine the value...Ch. 6 - Prob. 78ECh. 6 - 79. Calculate ΔHrxn for the reaction:
Fe2O3(s) + 3...Ch. 6 - 80. Calculate ΔHrxn for the reaction:
CaO(s) +...Ch. 6 - 81. Calculate ΔHrxn for the reaction:
5 C(s) + 6...Ch. 6 - 82. Calculate ΔHrxn for the reaction:
CH4(g) + 4...Ch. 6 - 83. Write an equation for the formation of each...Ch. 6 - Prob. 84ECh. 6 - 85. Hydrazine (N2H4) is a fuel used by some...Ch. 6 - Prob. 86ECh. 6 - Prob. 87ECh. 6 - Prob. 88ECh. 6 - 89. During photosynthesis, plants use energy from...Ch. 6 - Prob. 90ECh. 6 - 91. Top fuel dragsters and funny cars burn...Ch. 6 - 92. The explosive nitroglycerin (C3H5N3O9)...Ch. 6 - 93. Determine the mass of CO2 produced by burning...Ch. 6 - Prob. 94ECh. 6 - Prob. 95ECh. 6 - Prob. 96ECh. 6 - Prob. 97ECh. 6 - Prob. 98ECh. 6 - 99. Evaporating sweat cools the body because...Ch. 6 - Prob. 100ECh. 6 - 101. Use standard enthalpies of formation to...Ch. 6 - 102. Dry ice is solid carbon dioxide. Instead of...Ch. 6 - 103. A 25.5-g aluminum block is warmed to 65.4 °C...Ch. 6 - Prob. 104ECh. 6 - Prob. 105ECh. 6 - Prob. 106ECh. 6 - 107. Derive a relationship between ΔH and ΔE for a...Ch. 6 - Prob. 108ECh. 6 - Prob. 109ECh. 6 - Prob. 110ECh. 6 - Prob. 111ECh. 6 - 112. When 10.00 g of phosphorus is burned in O2(g)...Ch. 6 - Prob. 113ECh. 6 - 114. The of TiI3(s) is –328 kJ/mol and the ΔH°...Ch. 6 - Prob. 115ECh. 6 - Prob. 116ECh. 6 - Prob. 117ECh. 6 - 118. A pure gold ring and a pure silver ring have...Ch. 6 - Prob. 119ECh. 6 - Prob. 120ECh. 6 - Prob. 121ECh. 6 - Prob. 122ECh. 6 - Prob. 123ECh. 6 - Prob. 124ECh. 6 - Prob. 125ECh. 6 - Prob. 126ECh. 6 - Prob. 127ECh. 6 - Prob. 128ECh. 6 - Prob. 129ECh. 6 - Prob. 130ECh. 6 - 131. Which statement is true of the internal...Ch. 6 - Prob. 132ECh. 6 - 133. Which expression describes the heat evolved...Ch. 6 - Prob. 134ECh. 6 - 135. A 1-kg cylinder of aluminum and 1-kg jug of...Ch. 6 - Prob. 136ECh. 6 - 137. When 1 mol of a gas burns at constant...Ch. 6 - Prob. 138ECh. 6 - Prob. 139ECh. 6 - Have each group member write a problem involving...Ch. 6 - Prob. 141QGWCh. 6 - Prob. 142QGWCh. 6 - Prob. 143QGWCh. 6 - Prob. 144DIA
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