Question 1

Write the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).

Accepted Answer

KCl(s)<img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30"> K<s...

Question 2

The Lewis dot symbol for the calcium ion is

Accepted Answer

A)   (2+)  
B)  (-Ca-)  
C)   (  2+)  
D)  (Ca2+)  
E)  Ca" class="answers-bank-image d-inline" rel="preload" > 2+) 
B)  (-Ca-) 
C)   (2+)  
B)  (-Ca-)  
C)   (  2+)  
D)  (Ca2+)  
E)  Ca" class="answers-bank-image d-inline" rel="preload" > 2+) 
D)  (Ca2+) 
E)  CaF) C) and D)
G) B) and C)

Question 3

Which one of the following is most likely to be an ionic compound?

Accepted Answer

A)  CaCl2
B)  CO2
C)  CS2
D)  SO2
E)  OF2F) B) and E)
G) B) and C) A

Question 4

Nitrous oxide, N2O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.)

Accepted Answer

A)  -2
B)  -1
C)  0
D)  +1
E)  +2F) B) and E)
G) D) and E)

Question 5

Use bond energies to estimate the enthalpy of formation of HBr(g) . BE(H-H) = 436 kJ/mol
BE(Br-Br) = 192 kJ/mol
BE(H-Br) = 366 kJ/mol

Accepted Answer

A)  +262 kJ/mol
B)  -52 kJ/mol
C)  -104 kJ/mol
D)  +104 kJ/mol
E)  +52 kJ/molF) All of the above
G) B) and E)

Question 6

Assuming the octet rule is obeyed, how many covalent bonds will a nitrogen atom form to give a formal charge of zero?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) A) and C)
G) A) and B)

Question 7

The number of lone electron pairs in the NO2- ion is ___.

Accepted Answer

A)  4
B)  5
C)  6
D)  7
E)  8F) D) and E)
G) None of the above

Question 8

The number of resonance structures for the nitrate ion that satisfy the octet rule is

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  None of theseF) C) and D)
G) A) and D) C

Question 9

Write a Lewis structure for the chlorite ion, ClO2-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Accepted Answer

Question 10

Which one of the following ionic solids would have the largest lattice energy?

Accepted Answer

A)  NaCl
B)  NaF
C)  CaBr2
D)  CsI
E)  CaCl2F) None of the above
G) A) and B)

Question 11

Which one of the following molecules has an atom with an expanded octet?

Accepted Answer

A)  HCl
B)  AsCl5
C)  ICl
D)  NCl3
E)  Cl2F) B) and C)
G) A) and C)

Question 12

Which of the following Lewis structures is incorrect?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and E)
G) A) and D)

Question 13

The electron dot formula for O2 shows

Accepted Answer

A)  a single covalent bond
B)  a double covalent bond
C)  an ionic bond
D)  a total of 8 x 2 = 16 electron dots
E)  a total of 32 electron dotsF) A) and D)
G) C) and D)

Question 14

Write a Lewis structure for the chlorate ion, ClO3-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Accepted Answer

Question 15

Which one of the following is most likely to be a covalent compound?

Accepted Answer

A)  CsOH
B)  NF3
C)  Sr(NO3) 2
D)  CaO
E)  LiFF) All of the above
G) A) and B)

Question 16

Carbonic acid, H2CO3, is a weak acid that contributes to the taste and produces the carbon dioxide bubbles in all carbonated beverages.Write a Lewis structure for H2CO3,

Accepted Answer

Question 17

Calculate the energy change for the reaction K(g) + Br(g)  →\rarr→  K+(g) + Br- (g) 
Given the following ionization energy (IE) and electron affinity (EA) values +(g) + Br- (g)  Given the following ionization energy (IE) and electron affinity (EA) values   A) -1,092 kJ/mol B) -95 kJ/mol C) 95 kJ/mol D) 1,092 kJ/mol E) 1,187 kJ/mol " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  -1,092 kJ/mol
B)  -95 kJ/mol
C)  95 kJ/mol
D)  1,092 kJ/mol
E)  1,187 kJ/mol F) C) and D)
G) A) and C)

Question 18

Write a Lewis structure for the phosphate ion, PO43-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for PO43- that obey the octet rule.

Accepted Answer

<img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30"> Total number of res...

Question 19

Which of the following is a useful guideline for the application of formal charges in neutral molecules?

Accepted Answer

A)  A Lewis structure in which there are no formal charges is preferred.
B)  Lewis structures with large formal charges are preferred.
C)  The preferred Lewis structure is one in which positive formal charges are on the most electronegative atoms.D) A) and B)
E) A) and C)

Question 20

Write a Lewis structure for SO3 that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Accepted Answer

Exam 9: Chemical Bonding I: Basic Concepts

Write the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).

Correct Answer
verified
KCl(s) K
View Answer

The Lewis dot symbol for the calcium ion is

Correct Answer
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Which one of the following is most likely to be an ionic compound?

Correct Answer
verified
A

Nitrous oxide, N₂O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.)

Correct Answer
verified

Use bond energies to estimate the enthalpy of formation of HBr(g) . BE(H-H) = 436 kJ/mol BE(Br-Br) = 192 kJ/mol BE(H-Br) = 366 kJ/mol

Correct Answer
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Assuming the octet rule is obeyed, how many covalent bonds will a nitrogen atom form to give a formal charge of zero?

Correct Answer
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The number of lone electron pairs in the NO₂^- ion is ___.

Correct Answer
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The number of resonance structures for the nitrate ion that satisfy the octet rule is

Correct Answer
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C

Write a Lewis structure for the chlorite ion, ClO₂^-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct Answer
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Which one of the following ionic solids would have the largest lattice energy?

Correct Answer
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Which one of the following molecules has an atom with an expanded octet?

Correct Answer
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Which of the following Lewis structures is incorrect?

Correct Answer
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The electron dot formula for O₂ shows

Correct Answer
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Write a Lewis structure for the chlorate ion, ClO₃^-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct Answer
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Which one of the following is most likely to be a covalent compound?

Correct Answer
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Carbonic acid, H₂CO₃, is a weak acid that contributes to the taste and produces the carbon dioxide bubbles in all carbonated beverages.Write a Lewis structure for H₂CO₃,

Correct Answer
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11ea7cc5_018d_72ce_a2ab_876865e601f5_TB3245_00

Correct Answer
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Write a Lewis structure for the phosphate ion, PO₄^3-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for PO₄^3- that obey the octet rule.

Correct Answer
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Total number of res...
View Answer

Which of the following is a useful guideline for the application of formal charges in neutral molecules?

Correct Answer
verified

Write a Lewis structure for SO₃ that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct Answer
verified

Exam 9: Chemical Bonding I: Basic Concepts

Write the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).

Correct AnswerverifiedKCl(s) KView AnswerShow Answer

The Lewis dot symbol for the calcium ion is

Correct AnswerverifiedShow Answer

Which one of the following is most likely to be an ionic compound?

Correct AnswerverifiedA

Nitrous oxide, N2O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.)

Correct AnswerverifiedShow Answer

Use bond energies to estimate the enthalpy of formation of HBr(g) . BE(H-H) = 436 kJ/mol BE(Br-Br) = 192 kJ/mol BE(H-Br) = 366 kJ/mol

Correct AnswerverifiedShow Answer

Assuming the octet rule is obeyed, how many covalent bonds will a nitrogen atom form to give a formal charge of zero?

Correct AnswerverifiedShow Answer

The number of lone electron pairs in the NO2- ion is ___.

Correct AnswerverifiedShow Answer

The number of resonance structures for the nitrate ion that satisfy the octet rule is

Correct AnswerverifiedC

Write a Lewis structure for the chlorite ion, ClO2-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct AnswerverifiedShow Answer

Which one of the following ionic solids would have the largest lattice energy?

Correct AnswerverifiedShow Answer

Which one of the following molecules has an atom with an expanded octet?

Correct AnswerverifiedShow Answer

Which of the following Lewis structures is incorrect?

Correct AnswerverifiedShow Answer

The electron dot formula for O2 shows

Correct AnswerverifiedShow Answer

Write a Lewis structure for the chlorate ion, ClO3-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct AnswerverifiedShow Answer

Which one of the following is most likely to be a covalent compound?

Correct AnswerverifiedShow Answer

Carbonic acid, H2CO3, is a weak acid that contributes to the taste and produces the carbon dioxide bubbles in all carbonated beverages.Write a Lewis structure for H2CO3,

Correct Answerverified11ea7cc5_018d_72ce_a2ab_876865e601f5_TB3245_00

Calculate the energy change for the reaction K(g) + Br(g) →\rarr→ K+(g) + Br- (g) Given the following ionization energy (IE) and electron affinity (EA) values

Correct AnswerverifiedShow Answer

Write a Lewis structure for the phosphate ion, PO43-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for PO43- that obey the octet rule.

Correct Answerverified Total number of res...View AnswerShow Answer

Which of the following is a useful guideline for the application of formal charges in neutral molecules?

Correct AnswerverifiedShow Answer

Write a Lewis structure for SO3 that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct AnswerverifiedShow Answer

Correct Answer
verified
KCl(s) K
View Answer

Correct Answer
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Correct Answer
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A

Nitrous oxide, N₂O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.)

Correct Answer
verified

Correct Answer
verified

Correct Answer
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The number of lone electron pairs in the NO₂^- ion is ___.

Correct Answer
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Correct Answer
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C

Write a Lewis structure for the chlorite ion, ClO₂^-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The electron dot formula for O₂ shows

Correct Answer
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Write a Lewis structure for the chlorate ion, ClO₃^-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct Answer
verified

Correct Answer
verified

Carbonic acid, H₂CO₃, is a weak acid that contributes to the taste and produces the carbon dioxide bubbles in all carbonated beverages.Write a Lewis structure for H₂CO₃,

Correct Answer
verified
11ea7cc5_018d_72ce_a2ab_876865e601f5_TB3245_00

Correct Answer
verified

Write a Lewis structure for the phosphate ion, PO₄^3-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for PO₄^3- that obey the octet rule.

Correct Answer
verified
Total number of res...
View Answer

Correct Answer
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Write a Lewis structure for SO₃ that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct Answer
verified