Question 1

Which one of the following is most likely to be a covalent compound?

Accepted Answer

A)  Rb2O
B)  BaO
C)  SrO
D)  SeO2
E)  MnO2F) B) and E)
G) B) and D)

Question 2

Which of the elements listed below would most likely form an ionic bond when bonded to oxygen?

Accepted Answer

A)  Cl
B)  C
C)  O
D)  H
E)  CaF) D) and E)
G) B) and D)

Question 3

The Lewis dot symbol for the chloride ion is

Accepted Answer

A)     
B)       - 
C)       - 
D)       - 
E)  Cl-" class="answers-bank-image d-inline" rel="preload" >  
B)     
B)       - 
C)       - 
D)       - 
E)  Cl-" class="answers-bank-image d-inline" rel="preload" >   -
C)     
B)       - 
C)       - 
D)       - 
E)  Cl-" class="answers-bank-image d-inline" rel="preload" >   -
D)     
B)       - 
C)       - 
D)       - 
E)  Cl-" class="answers-bank-image d-inline" rel="preload" >   -
E)  Cl-F) None of the above
G) C) and E)

Question 4

Assuming the octet rule is obeyed, how many covalent bonds will a nitrogen atom form to give a formal charge of zero?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) A) and B)
G) A) and C)

Question 5

Write the Lewis dot symbol for the sulfide ion.

Accepted Answer

The answer of Write the Lewis dot symbol for the...

Question 6

Calculate the energy change for the reaction K(g) + Br(g)  →\rarr→  K+(g) + Br- (g) 
Given the following ionization energy (IE) and electron affinity (EA) values +(g) + Br- (g)  Given the following ionization energy (IE) and electron affinity (EA) values   A) -1,092 kJ/mol B) -95 kJ/mol C) 95 kJ/mol D) 1,092 kJ/mol E) 1,187 kJ/mol " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  -1,092 kJ/mol
B)  -95 kJ/mol
C)  95 kJ/mol
D)  1,092 kJ/mol
E)  1,187 kJ/mol F) All of the above
G) B) and E)

Question 7

The number of lone electron pairs in the N2 molecule is ___.

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) A) and E)
G) B) and E)

Question 8

Which one of these polar covalent bonds would have the greatest percent ionic character?

Accepted Answer

A)  H - Br
B)  H - Cl
C)  H - F
D)  H - IE) All of the above
F) A) and B)

Question 9

The properties and chemical reactivity of a molecule is best explained by analyzing all possible resonance structures for that molecule

Accepted Answer

A) True 
 B)False

Question 10

The standard enthalpy of formation of ammonia at 25°C is -46.3 kJ/mol.Estimate the N-H bond enthalpy at this temperature. (Given: BE(N ≡\equiv≡ N) =941.4 kJ/mol, BE(H-H) = 436.4 kJ/mol)

Accepted Answer

A)  360 kJ/mol
B)  383 kJ/mol
C)  391 kJ/mol
D)  459 kJ/mol
E)  475 kJ/mol F) A) and C)
G) None of the above

Question 11

Write the Lewis structure of ammonia (nitrogen trihydride).

Accepted Answer

The answer of Write the Lewis structure of ammonia (nitrogen...

Question 12

Which one of the following compounds utilizes both ionic and covalent bonding?

Accepted Answer

A)  Na2SO4
B)  AlCl3
C)  PO43-
D)  NH4+
E)  CaOF) C) and D)
G) A) and B)

Question 13

The electron dot formula for O2 shows

Accepted Answer

A)  a single covalent bond
B)  a double covalent bond
C)  an ionic bond
D)  a total of 8 x 2 = 16 electron dots
E)  a total of 32 electron dotsF) C) and D)
G) B) and C)

Question 14

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

Question 15

Assuming the octet rule is obeyed, how many covalent bonds will a carbon atom form to give a formal charge of zero?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) A) and D)
G) A) and E)

Question 16

The formal charge on the bromine atom in BrO3- drawn with three single bonds is

Accepted Answer

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

Question 17

What type of chemical bond holds the atoms together within a water molecule?

Accepted Answer

A)  Ionic bond
B)  Nonpolar covalent bond
C)  Polar covalent bond
D)  Coordinate covalent bondE) All of the above
F) C) and D)

Question 18

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

Accepted Answer

A)  KI
B)  KBr
C)  KCl
D)  KFE) B) and C)
F) B) and D)

Question 19

The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  None of theseF) A) and C)
G) D) and E)

Question 20

Which of the elements listed below would most likely form a polar covalent bond when bonded to oxygen?

Accepted Answer

A)  Mg
B)  H
C)  Al
D)  O
E)  NaF) A) and C)
G) C) and D)

Exam 9: Chemical Bonding I: Basic Concepts

Correct Answer
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The properties and chemical reactivity of a molecule is best explained by analyzing all possible resonance structures for that molecule

Correct Answer
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Which of the elements listed below would most likely form a polar covalent bond when bonded to oxygen?

Correct Answer
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The Lewis dot symbol for the chloride ion is

Correct Answer
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Write the Lewis dot symbol for the sulfide ion.

Correct Answer
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Assuming the octet rule is obeyed, how many covalent bonds will a carbon atom form to give a formal charge of zero?

Correct Answer
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The standard enthalpy of formation of ammonia at 25°C is -46.3 kJ/mol.Estimate the N-H bond enthalpy at this temperature. (Given: BE(N $\equiv$ N) =941.4 kJ/mol, BE(H-H) = 436.4 kJ/mol)

Correct Answer
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Which one of these polar covalent bonds would have the greatest percent ionic character?

Correct Answer
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The electron dot formula for O₂ shows

Correct Answer
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What type of chemical bond holds the atoms together within a water molecule?

Correct Answer
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Write the Lewis structure of ammonia (nitrogen trihydride).

Correct Answer
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The number of lone electron pairs in the N₂ molecule is ___.

Correct Answer
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Which one of the following compounds utilizes both ionic and covalent bonding?

Correct Answer
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The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

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=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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The formal charge on the bromine atom in BrO₃^-drawn with three single bonds is

Correct Answer
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Which of the elements listed below would most likely form an ionic bond when bonded to oxygen?

Correct Answer
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Which one of the following is most likely to be a covalent compound?

Correct Answer
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Assuming the octet rule is obeyed, how many covalent bonds will a nitrogen atom form to give a formal charge of zero?

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

Correct Answer
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Exam 9: Chemical Bonding I: Basic Concepts

Calculate the energy change for the reaction K(g) + Br(g) →\rarr→ K+(g) + Br- (g) Given the following ionization energy (IE) and electron affinity (EA) values

Correct AnswerverifiedShow Answer

The properties and chemical reactivity of a molecule is best explained by analyzing all possible resonance structures for that molecule

Correct AnswerverifiedShow Answer

Which of the elements listed below would most likely form a polar covalent bond when bonded to oxygen?

Correct AnswerverifiedShow Answer

The Lewis dot symbol for the chloride ion is

Correct AnswerverifiedShow Answer

Write the Lewis dot symbol for the sulfide ion.

Correct AnswerverifiedShow Answer

Assuming the octet rule is obeyed, how many covalent bonds will a carbon atom form to give a formal charge of zero?

Correct AnswerverifiedShow Answer

The standard enthalpy of formation of ammonia at 25°C is -46.3 kJ/mol.Estimate the N-H bond enthalpy at this temperature. (Given: BE(N ≡\equiv≡ N) =941.4 kJ/mol, BE(H-H) = 436.4 kJ/mol)

Correct AnswerverifiedShow Answer

Which one of these polar covalent bonds would have the greatest percent ionic character?

Correct AnswerverifiedShow Answer

The electron dot formula for O2 shows

Correct AnswerverifiedShow Answer

What type of chemical bond holds the atoms together within a water molecule?

Correct AnswerverifiedShow Answer

Write the Lewis structure of ammonia (nitrogen trihydride).

Correct AnswerverifiedShow Answer

The number of lone electron pairs in the N2 molecule is ___.

Correct AnswerverifiedShow Answer

Which one of the following compounds utilizes both ionic and covalent bonding?

Correct AnswerverifiedShow Answer

The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

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=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

The formal charge on the bromine atom in BrO3- drawn with three single bonds is

Correct AnswerverifiedShow Answer

Which of the elements listed below would most likely form an ionic bond when bonded to oxygen?

Correct AnswerverifiedShow Answer

Which one of the following is most likely to be a covalent compound?

Correct AnswerverifiedShow Answer

Assuming the octet rule is obeyed, how many covalent bonds will a nitrogen atom form to give a formal charge of zero?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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The standard enthalpy of formation of ammonia at 25°C is -46.3 kJ/mol.Estimate the N-H bond enthalpy at this temperature. (Given: BE(N $\equiv$ N) =941.4 kJ/mol, BE(H-H) = 436.4 kJ/mol)

Correct Answer
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Correct Answer
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The electron dot formula for O₂ shows

Correct Answer
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The number of lone electron pairs in the N₂ molecule is ___.

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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=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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The formal charge on the bromine atom in BrO₃^-drawn with three single bonds is

Correct Answer
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Correct Answer
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