Question 1

Choose the best Lewis structure for NH4⁺.

Accepted Answer

A)   4⁺. 
A)     
B)     
C)     
D)     
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B)   4⁺. 
A)     
B)     
C)     
D)     
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C)   4⁺. 
A)     
B)     
C)     
D)     
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D)   4⁺. 
A)     
B)     
C)     
D)     
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E)   4⁺. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) C) and D)
G) A) and D)

Question 2

Use Lewis theory to determine the chemical formula for the compound formed between Rb and S.

Accepted Answer

A)  RbS
B)  RbS2
C)  Rb2S
D)  Rb2S3
E)  Rb3S2F) B) and D)
G) B) and E)

Question 3

Match the following.
-C=N

Accepted Answer

A)  weakest ionic bond
B)  strongest covalent bond
C)  metallic bond
D)  highest melting point
E)  longest covalent bondF) Na-BrG) C-FH) C) and D)
I) C) and E)

Question 4

Describe the Lewis Dot structure for Al3+.

Accepted Answer

The Lewis dot struct...

Question 5

Choose the bond below that is least polar.

Accepted Answer

A)  P-F
B)  C-Br
C)  C-F
D)  C-I
E)  C-ClF) C) and D)
G) B) and D)

Question 6

Choose the best Lewis structure for NO3⁻.

Accepted Answer

A)   3⁻. 
A)     
B)     
C)     
D)     
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B)   3⁻. 
A)     
B)     
C)     
D)     
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C)   3⁻. 
A)     
B)     
C)     
D)     
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D)   3⁻. 
A)     
B)     
C)     
D)     
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E)   3⁻. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) All of the above
G) B) and E)

Question 7

Which molecule or compound below contains an ionic bond?

Accepted Answer

A)  CO2
B)  C2Cl4
C)  SiF4
D)  OCl2
E)  NH4NO3F) A) and C)
G) A) and B)

Question 8

Explain why the lattice energy of MgS is approximately 4 times as large as that of NaCl.

Accepted Answer

The Mg²⁺ and Na⁺ ion are similar in size ...

Question 9

Choose the best Lewis structure for BeF2.

Accepted Answer

A)   2. 
A)     
B)     
C)     
D)     
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B)   2. 
A)     
B)     
C)     
D)     
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C)   2. 
A)     
B)     
C)     
D)     
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D)   2. 
A)     
B)     
C)     
D)     
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E)   2. 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) A) and B)
G) C) and D)

Question 10

List the following compounds in decreasing electronegativity difference.
Cl2 HCl NaCl

Accepted Answer

A)  NaCl > Cl2 > HCl
B)  Cl2 > HCl > NaCl
C)  HCl > NaCl > Cl2
D)  NaCl > HCl > Cl2E) B) and D)
F) None of the above

Question 11

Identify an ionic bond.

Accepted Answer

A)  Electrons are pooled.
B)  Electrons are shared.
C)  Electrons are transferred.
D)  Protons are gained.
E)  Electrons are lost.F) B) and E)
G) C) and E)

Question 12

Liquid water when boiled at 100°C gets converted to water vapor.Which of the following statements is correct for this phase transition?

Accepted Answer

A)  The covalent bonds between hydrogen and oxygen atoms are broken.
B)  The intermolecular hydrogen bonds between water molecules are broken.
C)  The covalent bonds between hydrogen and oxygen atoms become weaker.
D)  The bond distance between hydrogen and oxygen atoms increases.E) A) and D)
F) A) and C)

Question 13

Define dipole moment.

Accepted Answer

Dipole moment is the measured ...

Question 14

Use the data to fill in the blank in the table with one of the choices given below.

Accepted Answer

A)  Electrons transferred
B)  Electrons shared
C)  Electrons pooled
D)  Electrons shared and pooledE) A) and C)
F) None of the above

Question 15

Which of the following reactions is associated with the lattice energy of Li2O (ΔH°latt) ?

Accepted Answer

A)  Li2O(s) → 2 Li+(g) + O2⁻(g) 
B)  2 Li⁺(aq) + O2⁻(aq) → Li2O(s) 
C)  2 Li⁺(g) + O2⁻(g) → Li2O(s) 
D)  Li2O(s) → 2 Li+(aq) + O2⁻(aq) 
E)  2 Li(s) + 2O (ΔH°latt) ? 
A)  Li2O(s) → 2 Li+(g) + O2⁻(g)  
B)  2 Li⁺(aq) + O2⁻(aq) → Li2O(s)  
C)  2 Li⁺(g) + O2⁻(g) → Li2O(s)  
D)  Li2O(s) → 2 Li+(aq) + O2⁻(aq)  
E)  2 Li(s) +   O2(g) → Li2O(s) " class="answers-bank-image d-inline" rel="preload" >O2(g) → Li2O(s) F) A) and D)
G) D) and E)

Question 16

Place the following elements in order of increasing electronegativity.
Na Rb P

Accepted Answer

A)  P 
B)  Na 
C)  Rb 
D)  Rb 
E)  P < Rb < NaF) B) and D)
G) B) and E)

Question 17

Which of the following processes is endothermic?

Accepted Answer

A)  the reaction associated with the lattice energy of LiCl
B)  the reaction associated with the ionization energy of potassium
C)  the reaction associated with the heat of formation of CaS
D)  the formation of F2 from its elements in their standard states
E)  None of the above are endothermic.F) C) and D)
G) B) and C)

Question 18

Draw the Lewis structure for CO32- including any valid resonance structures.Which of the following statements is true?

Accepted Answer

A)  The CO32- ion contains one C-O single bond and two C=O double bonds.
B)  The CO32- ion contains two C-O single bonds and one C=O double bonds
C)  The CO32- ion contains three double bonds.
D)  The CO32- ion contains two C-O single bonds and one C≡O triple bond.
E)  None of the above are true.F) B) and D)
G) B) and E)

Question 19

Identify the most electronegative element.

Accepted Answer

A)  Fr
B)  At
C)  H
D)  FE) None of the above
F) B) and C)

Question 20

How many lone pairs are on the Br atom in BrCl2-?

Accepted Answer

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

Exam 9: Chemical Bonding I: Lewis Theory

Use the data to fill in the blank in the table with one of the choices given below.

Correct AnswerverifiedShow Answer

Explain why the lattice energy of MgS is approximately 4 times as large as that of NaCl.

Correct AnswerverifiedThe Mg2⁺ and Na⁺ ion are similar in size ...View AnswerShow Answer

Draw the Lewis structure for CO32- including any valid resonance structures.Which of the following statements is true?

Correct AnswerverifiedShow Answer

Identify an ionic bond.

Correct AnswerverifiedShow Answer

How many lone pairs are on the Br atom in BrCl2-?

Correct AnswerverifiedShow Answer

Which of the following processes is endothermic?

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Describe the Lewis Dot structure for Al3+.

Correct AnswerverifiedThe Lewis dot struct...View AnswerShow Answer

List the following compounds in decreasing electronegativity difference. Cl2 HCl NaCl

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Which molecule or compound below contains an ionic bond?

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Liquid water when boiled at 100°C gets converted to water vapor.Which of the following statements is correct for this phase transition?

Correct AnswerverifiedShow Answer

Identify the most electronegative element.

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Choose the best Lewis structure for NO3⁻.

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Choose the best Lewis structure for BeF2.

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Choose the best Lewis structure for NH4⁺.

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Which of the following reactions is associated with the lattice energy of Li2O (ΔH°latt) ?

Correct AnswerverifiedShow Answer

Place the following elements in order of increasing electronegativity. Na Rb P

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Choose the bond below that is least polar.

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Match the following. -C=N

Correct AnswerverifiedShow Answer

Use Lewis theory to determine the chemical formula for the compound formed between Rb and S.

Correct AnswerverifiedShow Answer

Define dipole moment.

Correct AnswerverifiedDipole moment is the measured ...View AnswerShow Answer

Correct Answer
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Correct Answer
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The Mg²⁺ and Na⁺ ion are similar in size ...
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Draw the Lewis structure for CO₃^2- including any valid resonance structures.Which of the following statements is true?

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Correct Answer
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How many lone pairs are on the Br atom in BrCl₂^-?

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Correct Answer
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Describe the Lewis Dot structure for Al³⁺.

Correct Answer
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The Lewis dot struct...
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List the following compounds in decreasing electronegativity difference. Cl₂ HCl NaCl

Correct Answer
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Correct Answer
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Liquid water when boiled at 100^°C gets converted to water vapor.Which of the following statements is correct for this phase transition?

Correct Answer
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Correct Answer
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Choose the best Lewis structure for NO₃⁻.

Correct Answer
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Choose the best Lewis structure for BeF₂.

Correct Answer
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Choose the best Lewis structure for NH₄⁺.

Correct Answer
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Which of the following reactions is associated with the lattice energy of Li₂O (ΔH°_latt) ?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Dipole moment is the measured ...
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