Question 1

Which of the following statements is TRUE?

Accepted Answer

A)   An ionic bond is much stronger than most covalent bonds.
B)   An ionic bond is formed through the sharing of electrons.
C)   Ionic compounds at room temperature typically conduct electricity.
D)   Once dissolved in water, ionic compounds rarely conduct electricity.
E)   None of the above is true.

Question 2

Match the following.
-Sr-Sr

Accepted Answer

A)  strongest covalent bond
B)  longest covalent bond
C)  weakest ionic bond
D)  metallic bond
E)  highest melting point

Question 3

Choose the bond below that is the weakest.

Accepted Answer

A)   Na-Cl
B)   I-I
C)   C=N
D)   Li-F
E)   C=O

Question 4

Which of the following represent the Lewis structure for Cl?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 5

Choose the bond below that is most polar.

Accepted Answer

A)   H-I
B)   H-Br
C)   H-F
D)   H-Cl
E)   C-H

Question 6

Identify the substance that conducts electricity.

Accepted Answer

A)   NaCl dissolved in water
B)   solid NaCl
C)   water
D)   solid sugar
E)   sugar dissolved in water

Question 7

Choose the best Lewis structure for SF4.

Accepted Answer

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E)   4. 
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Question 8

Choose the best Lewis structure for PO43⁻.

Accepted Answer

A)   43⁻. 
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Question 9

Identify the compound with covalent bonding.

Accepted Answer

A)   Li2S
B)   SrO
C)   CaI2
D)   C2Cl4
E)   SrBr2

Question 10

Which molecule or compound below contains a polar covalent bond?

Accepted Answer

A)   C2H4
B)   ZnS
C)   LiI
D)   NCl3
E)   AgCl

Question 11

Identify the compound with the highest magnitude of lattice energy.

Accepted Answer

A)   MgO
B)   BaO
C)   SrO
D)   CaO

Question 12

Use the bond energies provided to estimate ΔrH° for the reaction below. PCl3(g)  + Cl2(g)  → PCl5(l)  ΔrH° = ?
Bond Bond Energy (kJ mol-1) 
Cl-Cl 243
P-Cl 331

Accepted Answer

A)   -243 kJ mol-1
B)   -419 kJ mol-1
C)   -662 kJ mol-1
D)   -67 kJ mol-1
E)   -905 kJ mol-1

Question 13

The Lewis structure of BrO3- is as follows:  What is the formal charge on Br atom?

Accepted Answer

Question 14

Choose the best Lewis structure for NH4⁺.

Accepted Answer

A)   4⁺. 
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Question 15

Choose the best Lewis structure for SeO42⁻.

Accepted Answer

A)   42⁻. 
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Question 16

The Lewis structure of acetate ion is as follows: 
 
What is the formal charge on oxygen atom that contains three lone pairs of electrons?

Accepted Answer

The answer of The Lewis structure of acetate ion is...

Question 17

Match the following.
-Ca-O

Accepted Answer

A)  strongest covalent bond
B)  longest covalent bond
C)  weakest ionic bond
D)  metallic bond
E)  highest melting point

Question 18

Draw the resonance structure that has the lowest formal charge on each atom for SO3-2. What is the formal charge on sulfur?

Accepted Answer

A)   -1
B)   +1
C)   0
D)   +2
E)   +3

Question 19

Using periodic trends, place the following bonds in order of increasing ionic character. S-F Se-F O-F

Accepted Answer

A)   Se-F 
B)   S-F 
C)   O-F 
D)   Se-F 
E)   O-F < S-F < Se-F

Question 20

Choose the best Lewis structure for OCl2.

Accepted Answer

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Exam 9: Chemical Bonding I: Lewis Theory

Choose the best Lewis structure for NH4⁺.

Correct AnswerverifiedShow Answer

Which of the following statements is TRUE?

Correct AnswerverifiedShow Answer

Match the following. -Ca-O

Correct AnswerverifiedShow Answer

The Lewis structure of acetate ion is as follows: What is the formal charge on oxygen atom that contains three lone pairs of electrons?

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for SeO42⁻.

Correct AnswerverifiedShow Answer

Identify the substance that conducts electricity.

Correct AnswerverifiedShow Answer

Which of the following represent the Lewis structure for Cl?

Correct AnswerverifiedShow Answer

The Lewis structure of BrO3- is as follows: What is the formal charge on Br atom?

Correct AnswerverifiedShow Answer

Choose the bond below that is the weakest.

Correct AnswerverifiedShow Answer

Using periodic trends, place the following bonds in order of increasing ionic character. S-F Se-F O-F

Correct AnswerverifiedShow Answer

Draw the resonance structure that has the lowest formal charge on each atom for SO3-2. What is the formal charge on sulfur?

Correct AnswerverifiedShow Answer

Identify the compound with the highest magnitude of lattice energy.

Correct AnswerverifiedShow Answer

Use the bond energies provided to estimate ΔrH° for the reaction below. PCl3(g) + Cl2(g) → PCl5(l) ΔrH° = ? Bond Bond Energy (kJ mol-1) Cl-Cl 243 P-Cl 331

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for PO43⁻.

Correct AnswerverifiedShow Answer

Match the following. -Sr-Sr

Correct AnswerverifiedShow Answer

Which molecule or compound below contains a polar covalent bond?

Correct AnswerverifiedShow Answer

Identify the compound with covalent bonding.

Correct AnswerverifiedShow Answer

Choose the bond below that is most polar.

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for SF4.

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for OCl2.

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for NH₄⁺.

Correct Answer
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Choose the best Lewis structure for SeO₄²⁻.

Correct Answer
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The Lewis structure of BrO₃^- is as follows: What is the formal charge on Br atom?

Correct Answer
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Draw the resonance structure that has the lowest formal charge on each atom for SO₃^-2. What is the formal charge on sulfur?

Correct Answer
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Correct Answer
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Use the bond energies provided to estimate Δ_rH° for the reaction below. PCl₃(g) + Cl₂(g) → PCl₅(l) Δ_rH°= ? Bond Bond Energy (kJ mol^-1) Cl-Cl 243 P-Cl 331

Correct Answer
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Choose the best Lewis structure for PO₄³⁻.

Correct Answer
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Choose the best Lewis structure for SF₄.

Correct Answer
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Choose the best Lewis structure for OCl₂.

Correct Answer
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