Question 1

Which of the following is a correct description of lattice energy?

Accepted Answer

A)  The energy change that occurs when electrons are removed from a lattice.
B)  The energy change that occurs when a gas condenses to a liquid.
C)  The energy change that occurs when a liquid freezes.
D)  The energy change that occurs when an ionic solid is separated into its ions in the gas phase.
E)  The lattice energy of a substance is identical to the ionic bond energy determined from coulombs law.F) C) and D)
G) A) and B)

Question 2

All of the following species are isoelectronic except

Accepted Answer

A)  S2-
B)  K+
C)  Na+
D)  Ar
E)  Cl-F) A) and D)
G) A) and C)

Question 3

In which of the following species is the octet rule violated by the central atom when the central atom has a formal charge of zero?

Accepted Answer

A)  SOCl2
B)  CCl4
C)  H2S
D)  PF3
E)  N2F4F) C) and D)
G) A) and D)

Question 4

Which of the following processes is not exothermic?

Accepted Answer

A)  Rb+(g) + e- → Rb(g) 
B)  ​Rb+(g) + Cl-(g) → RbCl(s) 
C)  ​Cl(g) + e- → Cl-(g) 
D)  ​Rb(g) → Rb(s) 
E)  ​ +(g) + e- → Rb(g)  
B)  ​Rb+(g) + Cl-(g) → RbCl(s)  
C)  ​Cl(g) + e- → Cl-(g)  
D)  ​Rb(g) → Rb(s)  
E)  ​   Cl2(g) → Cl(g) " class="answers-bank-image d-inline" rel="preload" > Cl2(g) → Cl(g) F) A) and B)
G) A) and E)

Question 5

What is the ground-state electron configuration of Co3+?

Accepted Answer

A)  [Ar]3d5
B)  [Ar]3d44s2
C)  [Ar]3d6
D)  [Ar]3d64s1
E)  [Ar]3d54s2F) A) and B)
G) All of the above

Question 6

Which of the following Lewis formulas is incorrect?

Accepted Answer

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

Question 7

For each of the following species except ____,the electronic structure may be adequately described by two resonance formulas.

Accepted Answer

A)  O3
B)  SO32-
C)  NO2-
D)  C6H6
E)  SO2F) B) and E)
G) B) and C)

Question 8

Rank the following ions in order of decreasing atomic radii: Te2-,Te4+,Te6+.

Accepted Answer

A)  Te2- > Te4+ > Te6+
B)  Te6+ > Te4+ > Te2-
C)  Te4+ > Te2- > Te6+
D)  Te2- > Te6+ > Te4+
E)  Te4+ > Te6+ > Te2-F) A) and B)
G) C) and D)

Question 9

Using bond-energy data,what is ΔH° for the following reaction?
CH3OH(g) + H2S(g) → CH3SH(g) + H2O(g) 
Bond
Bond Energy (kJ/mol) 
C-H
413
C-O
358
O-H
463
C-S
259
S-H
339

Accepted Answer

A)  -25 kJ
B)  -124 kJ
C)  25 kJ
D)  -2763 kJ
E)  2738 kJF) B) and D)
G) C) and E)

Question 10

Which of the following is a correct Lewis electron-dot formula for CO?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) All of the above
G) C) and D)

Question 11

Which one of the following has an enthalpy change that is equal to the lattice energy of SrCl2?

Accepted Answer

A)  SrCl2(s) ? Sr(g) + 2Cl(g) 
B)  SrCl2(s) ? Sr(g) + Cl2(g) 
C)  SrCl2(s) ? Sr2+(g) + 2Cl(g) 
D)  SrCl2(s) ? Sr(s) + Cl2(g) 
E)  SrCl2(s) ? Sr2+(g) + 2Cl-(g) F) A) and D)
G) None of the above

Question 12

The number of valence electrons in the propionate ion,CH3CH2COO-,is

Accepted Answer

A)  30.
B)  32.
C)  36.
D)  50.
E)  28.F) A) and C)
G) A) and E)

Question 13

Which of the following Lewis structures best describes BF3?

Accepted Answer

A)   3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) C) and E)
G) C) and D)

Question 14

How many valence electrons does a carbonate ion have?

Accepted Answer

A)  30
B)  28
C)  24
D)  32
E)  22F) B) and D)
G) A) and E)

Question 15

All of the following have ground-state noble-gas electron configurations except

Accepted Answer

A)  Ar
B)  N3-
C)  P3+
D)  Mg2+
E)  Cl-F) None of the above
G) A) and B)

Question 16

How many valence electrons are there in the trifluoroacetate ion,CF3COO-?

Accepted Answer

A)  41
B)  42
C)  54
D)  56
E)  40F) C) and D)
G) A) and D)

Question 17

What is the total number of valence electrons in N2O?

Accepted Answer

A)  16
B)  17
C)  34
D)  11
E)  22F) None of the above
G) A) and B)

Question 18

The total number of valence electrons in the phosphate ion is

Accepted Answer

A)  32.
B)  30.
C)  24.
D)  28.
E)  26.F) None of the above
G) All of the above

Question 19

Which of the following statements is true?

Accepted Answer

A)  The triple bond in N2 has a smaller bond order and a smaller bond length than the single bond in F2.
B)  The triple bond in N2 has a larger bond order and a smaller bond length than the single bond in F2.
C)  The triple bond in N2 has a smaller bond order and a larger bond length than the single bond in F2.
D)  The triple bond in N2 has a larger bond order and a larger bond length than the single bond in F2.
E)  The triple bond in N2 and the single bond in F2 have the same bond order and the same bond length.F) B) and D)
G) D) and E)

Question 20

Based on the following data,what is the I-I bond energy? 2(g) +   I2(g) → HI(g) ; ΔH = 26.36 kJ Bond Bond Energy (kJ/mol)  H-H 435 H-I 295 A) 365 kJ/mol B) 208 kJ/mol C) -208 kJ/mol D) -155 kJ/mol E) 155 kJ/mol" class="answers-bank-image d-inline" rel="preload" > H2(g) + 2(g) +   I2(g) → HI(g) ; ΔH = 26.36 kJ Bond Bond Energy (kJ/mol)  H-H 435 H-I 295 A) 365 kJ/mol B) 208 kJ/mol C) -208 kJ/mol D) -155 kJ/mol E) 155 kJ/mol" class="answers-bank-image d-inline" rel="preload" >
I2(g) → HI(g) ; ΔH = 26.36 kJ
Bond
Bond Energy (kJ/mol) 
H-H
435
H-I
295

Accepted Answer

A)  365 kJ/mol
B)  208 kJ/mol
C)  -208 kJ/mol
D)  -155 kJ/mol
E)  155 kJ/molF) All of the above
G) None of the above

Exam 9: Ionic and Covalent Bonding

The total number of valence electrons in the phosphate ion is

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All of the following have ground-state noble-gas electron configurations except

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Which of the following Lewis structures best describes BF3?

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Rank the following ions in order of decreasing atomic radii: Te2-,Te4+,Te6+.

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Which of the following is a correct Lewis electron-dot formula for CO?

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The number of valence electrons in the propionate ion,CH3CH2COO-,is

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All of the following species are isoelectronic except

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Which one of the following has an enthalpy change that is equal to the lattice energy of SrCl2?

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How many valence electrons are there in the trifluoroacetate ion,CF3COO-?

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Which of the following processes is not exothermic?

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For each of the following species except ____,the electronic structure may be adequately described by two resonance formulas.

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Using bond-energy data,what is ΔH° for the following reaction? CH3OH(g) + H2S(g) → CH3SH(g) + H2O(g) Bond Bond Energy (kJ/mol) C-H 413 C-O 358 O-H 463 C-S 259 S-H 339

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Which of the following is a correct description of lattice energy?

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How many valence electrons does a carbonate ion have?

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What is the total number of valence electrons in N2O?

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Which of the following Lewis formulas is incorrect?

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What is the ground-state electron configuration of Co3+?

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In which of the following species is the octet rule violated by the central atom when the central atom has a formal charge of zero?

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Which of the following statements is true?

Correct AnswerverifiedShow Answer

Based on the following data,what is the I-I bond energy? H2(g) + I2(g) → HI(g) ; ΔH = 26.36 kJ Bond Bond Energy (kJ/mol) H-H 435 H-I 295

Correct AnswerverifiedShow Answer

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Which of the following Lewis structures best describes BF₃?

Correct Answer
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Rank the following ions in order of decreasing atomic radii: Te^2-,Te⁴⁺,Te⁶⁺.

Correct Answer
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The number of valence electrons in the propionate ion,CH₃CH₂COO^-,is

Correct Answer
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Correct Answer
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Which one of the following has an enthalpy change that is equal to the lattice energy of SrCl₂?

Correct Answer
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How many valence electrons are there in the trifluoroacetate ion,CF₃COO^-?

Correct Answer
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Correct Answer
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Using bond-energy data,what is ΔH° for the following reaction? CH₃OH(g) + H₂S(g) → CH₃SH(g) + H₂O(g) Bond Bond Energy (kJ/mol) C-H 413 C-O 358 O-H 463 C-S 259 S-H 339

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Correct Answer
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What is the total number of valence electrons in N₂O?

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What is the ground-state electron configuration of Co³⁺?

Correct Answer
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Correct Answer
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Correct Answer
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Based on the following data,what is the I-I bond energy? H₂(g) + I₂(g) → HI(g) ; ΔH = 26.36 kJ Bond Bond Energy (kJ/mol) H-H 435 H-I 295

Correct Answer
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