Question 1

Identify the compound with the smallest dipole moment in the gas phase.

Accepted Answer

A)  N2 
B)  ClF 
C)  HF 
D)  NaCl 
E)  CHCl3 
A)  N2 
B)  ClF 
C)  HF 
D)  NaCl 
E)  CHCl3

Question 2

Draw the best Lewis structure for the free radical,NO2.What is the formal charge on the N?

Accepted Answer

A)  +7 
B)  +1 
C)  -1 
D)  +2 
E)  +4 
A)  +7 
B)  +1 
C)  -1 
D)  +2 
E)  +4

Question 3

Choose the bond below that is the weakest.

Accepted Answer

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

Question 4

Choose the best Lewis structure for SO42⁻.

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 5

Which element can expand its valence shell to accommodate more than eight electrons?

Accepted Answer

A)  B 
B)  F 
C)  S 
D)  He 
E)  H 
A)  B 
B)  F 
C)  S 
D)  He 
E)  H

Question 6

Which compound has the highest carbon-carbon bond strength?

Accepted Answer

A)  CH3CH3 
B)  CH2CH2 
C)  HCCH 
D)  All bond strengths are the same. 
A)  CH3CH3 
B)  CH2CH2 
C)  HCCH 
D)  All bond strengths are the same.

Question 7

Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl. DH°(kJ)
K(s)→ K(g)89
K(g)→ K⁺(g)+ e⁻ 418
Cl2(g)→ 2 Cl(g)244
Cl(g)+ e⁻ → Cl⁻(g)-349
KCl(s)→ K⁺(g)+ Cl⁻(g)717

Accepted Answer

A)  -1119 kJ 
B)  -997 kJ 
C)  -437 kJ 
D)  +631 kJ 
E)  +158 kJ 
A)  -1119 kJ 
B)  -997 kJ 
C)  -437 kJ 
D)  +631 kJ 
E)  +158 kJ

Question 8

Choose the best Lewis structure for NO3⁻.

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 9

Identify an ionic bond.

Accepted Answer

A)  Electrons are pooled. 
B)  Electrons are shared. 
C)  Electrons are transferred. 
D)  Neutrons are gained. 
E)  Electrons are lost. 
A)  Electrons are pooled. 
B)  Electrons are shared. 
C)  Electrons are transferred. 
D)  Neutrons are gained. 
E)  Electrons are lost.

Question 10

Identify the number of bonding pairs and lone pairs of electrons in H2O2.

Accepted Answer

A)  2 bonding pairs and 2 lone pairs 
B)  1 bonding pair and 3 lone pairs 
C)  3 bonding pairs and 3 lone pairs 
D)  3 bonding pairs and 4 lone pairs 
E)  4 bonding pairs and 0 lone pairs 
A)  2 bonding pairs and 2 lone pairs 
B)  1 bonding pair and 3 lone pairs 
C)  3 bonding pairs and 3 lone pairs 
D)  3 bonding pairs and 4 lone pairs 
E)  4 bonding pairs and 0 lone pairs

Question 11

Draw the Lewis structure for the acetate ion,CH3CO2⁻,including any important resonance structures.Label each atom with its formal charge.

Accepted Answer

There should be two equivalent

Question 12

Choose the best Lewis structure for NH4⁺.

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 13

Identify the ionic compound that is used as an image enhancer in x-rays.

Accepted Answer

A)  potassium permanganate 
B)  barium sulfate 
C)  lithium carbonate 
D)  sodium chloride 
E)  sodium bicarbonate 
A)  potassium permanganate 
B)  barium sulfate 
C)  lithium carbonate 
D)  sodium chloride 
E)  sodium bicarbonate

Question 14

Use the data given below to construct a Born-Haber cycle to determine the lattice energy of CaO. DH°(kJ)
Ca(s)→ Ca(g)193
Ca(g)→ Ca⁺(g)+ e⁻ 590
Ca⁺(g)→ Ca2⁺(g)+ e⁻ 1010
2 O(g)→ O2(g)-498
O(g)+ e⁻ → O⁻(g)-141
O⁻(g)+ e⁻ → O2⁻(g)878
Ca(s)+   O2(g)→ CaO(s)-635

Accepted Answer

A)  -3414 kJ 
B)  +1397 kJ 
C)  -2667 kJ 
D)  +3028 kJ 
E)  -2144 kJ 
A)  -3414 kJ 
B)  +1397 kJ 
C)  -2667 kJ 
D)  +3028 kJ 
E)  -2144 kJ

Question 15

Use the data given below to construct a Born-Haber cycle to determine the second ionization energy of Ca. DH°(kJ)
Ca(s)→ Ca(g)193
Ca(g)→ Ca⁺(g)+ e⁻ 590.
2 O(g)→ O2(g)-498
O(g)+ e⁻ → O⁻(g)-141
O⁻(g)+ e⁻ → O2⁻(g)878
Ca(s)+   O2(g)→ CaO(s)-635
Ca2⁺(g)+ O2⁻(g)→ CaO(s)-3414

Accepted Answer

A)  1010 kJ 
B)  1757 kJ 
C)  1508 kJ 
D)  -3027 kJ 
E)  -1514 kJ 
A)  1010 kJ 
B)  1757 kJ 
C)  1508 kJ 
D)  -3027 kJ 
E)  -1514 kJ

Question 16

Identify the compound with covalent bonding.

Accepted Answer

A)  KBr 
B)  K 
C)  H2Se 
D)  Ne 
E)  O 
A)  KBr 
B)  K 
C)  H2Se 
D)  Ne 
E)  O

Question 17

Which of the following represents the Lewis structure for Br⁻?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 18

Use Lewis theory to determine the chemical formula for the compound formed between Al and F.

Accepted Answer

A)  Al3F2 
B)  Al2F3 
C)  AlF2 
D)  AlF 
E)  AlF3 
A)  Al3F2 
B)  Al2F3 
C)  AlF2 
D)  AlF 
E)  AlF3

Question 19

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

Accepted Answer

A)  Al3O2 
B)  Al2O3 
C)  AlO2 
D)  Al2O 
E)  AlO 
A)  Al3O2 
B)  Al2O3 
C)  AlO2 
D)  Al2O 
E)  AlO

Question 20

Draw the Lewis structure for BrO3-.Make sure to include any important resonance structures.

Accepted Answer

Three equivalent resonance structures sh

Exam 9: Chemical Bonding I: Lewis Theory

Identify the compound with the smallest dipole moment in the gas phase.

Draw the best Lewis structure for the free radical,NO2.What is the formal charge on the N?

Choose the bond below that is the weakest.

Choose the best Lewis structure for SO42⁻.

Which element can expand its valence shell to accommodate more than eight electrons?

Which compound has the highest carbon-carbon bond strength?

Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl. DH°(kJ) K(s)→ K(g)89 K(g)→ K⁺(g)+ e⁻ 418 Cl2(g)→ 2 Cl(g)244 Cl(g)+ e⁻ → Cl⁻(g)-349 KCl(s)→ K⁺(g)+ Cl⁻(g)717

Choose the best Lewis structure for NO3⁻.

Identify an ionic bond.

Identify the number of bonding pairs and lone pairs of electrons in H2O2.

Draw the Lewis structure for the acetate ion,CH3CO2⁻,including any important resonance structures.Label each atom with its formal charge.

Choose the best Lewis structure for NH4⁺.

Identify the ionic compound that is used as an image enhancer in x-rays.

Use the data given below to construct a Born-Haber cycle to determine the lattice energy of CaO. DH°(kJ) Ca(s)→ Ca(g)193 Ca(g)→ Ca⁺(g)+ e⁻ 590 Ca⁺(g)→ Ca2⁺(g)+ e⁻ 1010 2 O(g)→ O2(g)-498 O(g)+ e⁻ → O⁻(g)-141 O⁻(g)+ e⁻ → O2⁻(g)878 Ca(s)+ O2(g)→ CaO(s)-635

Identify the compound with covalent bonding.

Which of the following represents the Lewis structure for Br⁻?

Use Lewis theory to determine the chemical formula for the compound formed between Al and F.

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

Draw the Lewis structure for BrO3-.Make sure to include any important resonance structures.

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Draw the best Lewis structure for the free radical,NO₂.What is the formal charge on the N?

Choose the best Lewis structure for SO₄²⁻.

Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl. DH°(kJ) K(s)→ K(g)89 K(g)→ K⁺(g)+ e⁻ 418 Cl₂(g)→ 2 Cl(g)244 Cl(g)+ e⁻ → Cl⁻(g)-349 KCl(s)→ K⁺(g)+ Cl⁻(g)717

Choose the best Lewis structure for NO₃⁻.

Identify the number of bonding pairs and lone pairs of electrons in H₂O₂.

Draw the Lewis structure for the acetate ion,CH₃CO₂⁻,including any important resonance structures.Label each atom with its formal charge.

Choose the best Lewis structure for NH₄⁺.

Use the data given below to construct a Born-Haber cycle to determine the lattice energy of CaO. DH°(kJ) Ca(s)→ Ca(g)193 Ca(g)→ Ca⁺(g)+ e⁻ 590 Ca⁺(g)→ Ca²⁺(g)+ e⁻ 1010 2 O(g)→ O₂(g)-498 O(g)+ e⁻ → O⁻(g)-141 O⁻(g)+ e⁻ → O²⁻(g)878 Ca(s)+ O₂(g)→ CaO(s)-635

Draw the Lewis structure for BrO₃^-.Make sure to include any important resonance structures.