Question 1

A nonpolar covalent bond (i.e., pure covalent) would form in which one of the following pairs of atoms?

Accepted Answer

A)  Na - Cl
B)  H - Cl
C)  Li - Br
D)  Se - Br
E)  Br - BrF) A) and B)
G) B) and E)

Question 2

Which of the elements listed below is the least electronegative?

Accepted Answer

A)  Sr
B)  V
C)  Ni
D)  P
E)  IF) A) and B)
G) D) and E)

Question 3

Write a Lewis structure for SO3 that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO3 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 4

Use the Born-Haber cycle to calculate the lattice energy of KCl(s) given the following data:  Δ\DeltaΔ H(sublimation) K = 79.2 kJ/mol
I1 (K) = 418.7 kJ/mol
Bond energy (Cl-Cl) = 242.8 kJ/mol
EA (Cl) = 348 kJ/mol
 Δ\DeltaΔ H 1 (K) = 418.7 kJ/mol Bond energy (Cl-Cl) = 242.8 kJ/mol EA (Cl) = 348 kJ/mol  \Delta H   (KCl(s) ) = -435.7 kJ/mol A) -165 kJ/mol B) 288 kJ/mol C) 629 kJ/mol D) 707 kJ/mol E) 828 kJ/mol " class="answers-bank-image d-inline" rel="preload" > (KCl(s) ) = -435.7 kJ/mol

Accepted Answer

A)  -165 kJ/mol
B)  288 kJ/mol
C)  629 kJ/mol
D)  707 kJ/mol
E)  828 kJ/mol F) B) and D)
G) B) and C)

Question 5

What is the formal charge on the singly bonded oxygens in the Lewis structure for the carbonate ion?

Accepted Answer

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

Question 6

Estimate the enthalpy change for the combustion of one mole of acetylene, C2H2, to form carbon dioxide and water vapor. BE(C-H) = 456 kJ/mol
BE(C ≡\equiv≡ C) = 962 kJ/mol
BE(O=O) = 499 kJ/mol
BE(C=O) = 802 kJ/mol
BE(O-H) = 462 kJ/mol

Accepted Answer

A)  -1759 kJ/mol
B)  +653 kJ/mol
C)  +1010 kJ/mol
D)  -1010 kJ/mol
E)  -155 kJ/mol F) A) and E)
G) B) and C)

Question 7

Which of the following solids would have the lowest melting point?

Accepted Answer

A)  KI
B)  KBr
C)  KCl
D)  KFE) None of the above
F) B) and D)

Question 8

The polarity of covalent bonds increases as the percent ionic character increases.

Accepted Answer

A) True 
 B)False

Question 9

Which of the bonds below would have the greatest polarity (i.e., highest percent ionic character) ?

Accepted Answer

A)  Si - P
B)  Si - S
C)  Si - Se
D)  Si - Cl
E)  Si - IF) A) and C)
G) C) and D)

Question 10

Use the bond enthalpy data given to estimate the heat released when 25.0 g of acetylene gas, C2H2, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C. BE(C-C) = 347 kJ/mol
BE(C ≡\equiv≡ C) = 812 kJ/mol
BE(C=O in CO2) = 799 kJ/mol
BE(C-H) = 414 kJ/mol
BE(O-H) = 460 kJ/mol
BE(O=O) = 498.7 kJ/mol

Accepted Answer

A)  1180 kJ
B)  447 kJ
C)  364 kJ
D)  1230 kJ
E)  16.8 kJ F) B) and C)
G) B) and D)

Question 11

The Lewis structure for CS2 is:

Accepted Answer

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

Question 12

The Lewis dot symbol for the a lead atom is

Accepted Answer

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

Question 13

What is the formal charge on sulfur in the best Lewis structure for the SCN- (thiocyanate) ion?

Accepted Answer

A)  +2
B)  -2
C)  +1
D)  -1
E)  0F) All of the above
G) D) and E)

Question 14

What is the formal charge on phosphorus in a Lewis structure for the phosphate ion that satisfies the octet rule?

Accepted Answer

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

Question 15

The Si - Cl bond has less ionic character than the C - Cl bond.

Accepted Answer

A) True 
 B)False

Question 16

Complete this statement: Coulomb's law states that the magnitude of the force of interaction between two charged bodies is

Accepted Answer

A)  directly proportional to the product of the charges on the bodies and directly proportional to the distance separating them.
B)  directly proportional to the product of the charges on the bodies, and inversely proportional to the square of the distance separating them.
C)  inversely proportional to the product of the charges on the bodies, and directly proportional to the square of the distance separating them.
D)  directly proportional to the sum of the charges on the bodies, and inversely proportional to the square of the distance separating them.E) All of the above
F) A) and C)

Question 17

Which of the following solids would have the highest melting point?

Accepted Answer

A)  NaF
B)  NaCl
C)  NaBr
D)  NaIE) All of the above
F) B) and C)

Question 18

Which of the following covalent bonds is the most polar (i.e., highest percent ionic character) ?

Accepted Answer

A)  Al - I
B)  Si - I
C)  Al - Cl
D)  Si - Cl
E)  Si - PF) A) and B)
G) C) and E)

Question 19

Which one of the following compounds does not follow the octet rule?

Accepted Answer

A)  NF3
B)  CO2
C)  CF4
D)  Br2
E)  NOF) None of the above
G) A) and B)

Question 20

How many covalent bonds will be drawn to bromine in BrO3- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s) .

Accepted Answer

A)  3
B)  4
C)  5
D)  6
E)  7F) B) and D)
G) C) and D)

Exam 9: Chemical Bonding I: Basic Concepts

Which of the following covalent bonds is the most polar (i.e., highest percent ionic character) ?

Correct Answer
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Which one of the following compounds does not follow the octet rule?

Correct Answer
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The Si - Cl bond has less ionic character than the C - Cl bond.

Correct Answer
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Write a Lewis structure for SO₃ that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO₃ that obey the octet rule.

Correct Answer
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Total number of res...
View Answer

How many covalent bonds will be drawn to bromine in BrO₃^- for the dot structure 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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What is the formal charge on the singly bonded oxygens in the Lewis structure for the carbonate ion?

Correct Answer
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Complete this statement: Coulomb's law states that the magnitude of the force of interaction between two charged bodies is

Correct Answer
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What is the formal charge on phosphorus in a Lewis structure for the phosphate ion that satisfies the octet rule?

Correct Answer
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Which of the following solids would have the highest melting point?

Correct Answer
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The Lewis structure for CS₂ is:

Correct Answer
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Which of the elements listed below is the least electronegative?

Correct Answer
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Estimate the enthalpy change for the combustion of one mole of acetylene, C₂H₂, to form carbon dioxide and water vapor. BE(C-H) = 456 kJ/mol BE(C $\equiv$ C) = 962 kJ/mol BE(O=O) = 499 kJ/mol BE(C=O) = 802 kJ/mol BE(O-H) = 462 kJ/mol

Correct Answer
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What is the formal charge on sulfur in the best Lewis structure for the SCN^- (thiocyanate) ion?

Correct Answer
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Which of the following solids would have the lowest melting point?

Correct Answer
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A nonpolar covalent bond (i.e., pure covalent) would form in which one of the following pairs of atoms?

Correct Answer
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Correct Answer
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The Lewis dot symbol for the a lead atom is

Correct Answer
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The polarity of covalent bonds increases as the percent ionic character increases.

Correct Answer
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Which of the bonds below would have the greatest polarity (i.e., highest percent ionic character) ?

Correct Answer
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Exam 9: Chemical Bonding I: Basic Concepts

Which of the following covalent bonds is the most polar (i.e., highest percent ionic character) ?

Correct AnswerverifiedShow Answer

Use the Born-Haber cycle to calculate the lattice energy of KCl(s) given the following data: Δ\DeltaΔ H(sublimation) K = 79.2 kJ/mol I1 (K) = 418.7 kJ/mol Bond energy (Cl-Cl) = 242.8 kJ/mol EA (Cl) = 348 kJ/mol Δ\DeltaΔ H (KCl(s) ) = -435.7 kJ/mol

Correct AnswerverifiedShow Answer

Which one of the following compounds does not follow the octet rule?

Correct AnswerverifiedShow Answer

The Si - Cl bond has less ionic character than the C - Cl bond.

Correct AnswerverifiedShow Answer

Write a Lewis structure for SO3 that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO3 that obey the octet rule.

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

How many covalent bonds will be drawn to bromine in BrO3- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s) .

Correct AnswerverifiedShow Answer

What is the formal charge on the singly bonded oxygens in the Lewis structure for the carbonate ion?

Correct AnswerverifiedShow Answer

Complete this statement: Coulomb's law states that the magnitude of the force of interaction between two charged bodies is

Correct AnswerverifiedShow Answer

What is the formal charge on phosphorus in a Lewis structure for the phosphate ion that satisfies the octet rule?

Correct AnswerverifiedShow Answer

Which of the following solids would have the highest melting point?

Correct AnswerverifiedShow Answer

The Lewis structure for CS2 is:

Correct AnswerverifiedShow Answer

Which of the elements listed below is the least electronegative?

Correct AnswerverifiedShow Answer

Estimate the enthalpy change for the combustion of one mole of acetylene, C2H2, to form carbon dioxide and water vapor. BE(C-H) = 456 kJ/mol BE(C ≡\equiv≡ C) = 962 kJ/mol BE(O=O) = 499 kJ/mol BE(C=O) = 802 kJ/mol BE(O-H) = 462 kJ/mol

Correct AnswerverifiedShow Answer

What is the formal charge on sulfur in the best Lewis structure for the SCN- (thiocyanate) ion?

Correct AnswerverifiedShow Answer

Which of the following solids would have the lowest melting point?

Correct AnswerverifiedShow Answer

A nonpolar covalent bond (i.e., pure covalent) would form in which one of the following pairs of atoms?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The Lewis dot symbol for the a lead atom is

Correct AnswerverifiedShow Answer

The polarity of covalent bonds increases as the percent ionic character increases.

Correct AnswerverifiedShow Answer

Which of the bonds below would have the greatest polarity (i.e., highest percent ionic character) ?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Write a Lewis structure for SO₃ that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO₃ that obey the octet rule.

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

How many covalent bonds will be drawn to bromine in BrO₃^- for the dot structure 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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Correct Answer
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The Lewis structure for CS₂ is:

Correct Answer
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Correct Answer
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Estimate the enthalpy change for the combustion of one mole of acetylene, C₂H₂, to form carbon dioxide and water vapor. BE(C-H) = 456 kJ/mol BE(C $\equiv$ C) = 962 kJ/mol BE(O=O) = 499 kJ/mol BE(C=O) = 802 kJ/mol BE(O-H) = 462 kJ/mol

Correct Answer
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What is the formal charge on sulfur in the best Lewis structure for the SCN^- (thiocyanate) ion?

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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Correct Answer
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