Question 1

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 dots.F) A) and B)
G) C) and E)

Question 2

Arrange the elements C, O, and H in order of increasing electronegativity.

Accepted Answer

A)   C 
B)   H 
C)   C 
D)   O 
E)   H < O < CF) B) and C)
G) C) and E)

Question 3

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

Accepted Answer

A)   CO32-
B)   Al2(SO4) 3
C)   CO2
D)   C6H12O6
E)   MgCl2F) All of the above
G) A) and C)

Question 4

A molecule with two resonance structures is shifting quickly back and forth from one structure to the other.

Accepted Answer

A) True 
 B)False

Question 5

The number of lone electron pairs in the ClO4- ion is ___.

Accepted Answer

A)   3
B)   4
C)   6
D)   12
E)   24F) A) and E)
G) D) and E)

Question 6

The bond in F2 is described as polar covalent.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) None of the above
G) A) and E)

Question 8

The total number of valence electrons in the ion NH4+ is

Accepted Answer

A)   8.
B)   9.
C)   10.
D)   17.
E)   18.F) C) and E)
G) A) and D)

Question 9

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 ∘\circ∘ 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)   16.8 kJ
B)   364 kJ
C)   447 kJ
D)   1180 kJ
E)   1230 kJ F) B) and E)
G) C) and E)

Question 10

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) B) and C)
G) B) and D)

Question 11

How many resonance phosphate Lewis structures can be drawn for the phosphate ion, PO43-, that obey the octet rule

Accepted Answer

A)   One
B)   Two
C)   Three
D)   Four
E)   None of the above are correctF) B) and C)
G) A) and E)

Question 12

The structure below depicts the correct Lewis structure for Dichloromethane, CH2Cl2 (an important solvent in synthetic chemistry).

Accepted Answer

A) True 
 B)False

Question 13

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) A) and D)

Question 14

Which of the following ionic solids would have the largest lattice energy

Accepted Answer

A)   KF
B)   KI
C)   LiF
D)   LiI
E)   NaFF) A) and B)
G) A) and C)

Question 15

Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C3H8, burns in excess oxygen to yield carbon dioxide and water vapor at 25 ∘\circ∘ C.
BE(C-C)  = 347 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)   1360 kJ
B)   1540 kJ
C)   1970 kJ
D)   2240 kJ
E)   2370 kJ F) C) and E)
G) None of the above

Question 16

Which one of the following molecules has an atom with an incomplete octet

Accepted Answer

A)   NF3
B)   H2O
C)   AsCl3
D)   GeH4
E)   BF3F) C) and D)
G) B) and E)

Question 17

For which of these species does the best Lewis structure have two or more equivalent resonance structures

Accepted Answer

A)   HCO2-
B)   SCN-
C)   CNO-
D)   N3-
E)   CO2F) A) and B)
G) C) and D)

Question 18

What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for the fulminate ion, CNO-, based on minimizing formal charge overall

Accepted Answer

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

Question 19

Shown here is a Lewis structure for the chlorate ion, ClO3-, that obeys the octet rule, showing all non-zero formal charges. How many resonance structures for ClO3- are possible that obey the octet rule 3-, that obeys the octet rule, showing all non-zero formal charges. How many resonance structures for ClO3- are possible that obey the octet rule   A)  Four B)  Three C)  two D)  One E)  None of the above" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   Four
B)   Three
C)   two
D)   One
E)   None of the aboveF) A) and B)
G) C) and D)

Question 20

Which of the elements listed below is most likely to exhibit an expanded octet in its compounds

Accepted Answer

A)   O
B)   S
C)   Na
D)   C
E)   NF) A) and E)
G) B) and C)

Exam 9: Chemical Bonding I: Basic Concepts

Which of the elements listed below is most likely to exhibit an expanded octet in its compounds

Correct Answer
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For which of these species does the best Lewis structure have two or more equivalent resonance structures

Correct Answer
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The bond in F₂ is described as polar covalent.

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 structure below depicts the correct Lewis structure for Dichloromethane, CH₂Cl₂ (an important solvent in synthetic chemistry).

Correct Answer
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Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C₃H₈, burns in excess oxygen to yield carbon dioxide and water vapor at 25^$\circ$C. BE(C-C) = 347 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

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

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

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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Correct Answer
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Arrange the elements C, O, and H in order of increasing electronegativity.

Correct Answer
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A molecule with two resonance structures is shifting quickly back and forth from one structure to the other.

Correct Answer
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The number of lone electron pairs in the ClO₄^- ion is ___.

Correct Answer
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The electron dot formula for O₂ shows

Correct Answer
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What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for the fulminate ion, CNO^-, based on minimizing formal charge overall

Correct Answer
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How many resonance phosphate Lewis structures can be drawn for the phosphate ion, PO₄^3-, that obey the octet rule

Correct Answer
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Which of the following ionic solids would have the largest lattice energy

Correct Answer
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Which one of the following molecules has an atom with an incomplete octet

Correct Answer
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Shown here is a Lewis structure for the chlorate ion, ClO₃^-, that obeys the octet rule, showing all non-zero formal charges. How many resonance structures for ClO₃^- are possible that obey the octet rule

Correct Answer
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The total number of valence electrons in the ion NH₄⁺ is

Correct Answer
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Exam 9: Chemical Bonding I: Basic Concepts

Which of the elements listed below is most likely to exhibit an expanded octet in its compounds

Correct AnswerverifiedShow Answer

For which of these species does the best Lewis structure have two or more equivalent resonance structures

Correct AnswerverifiedShow Answer

The bond in F2 is described as polar covalent.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The structure below depicts the correct Lewis structure for Dichloromethane, CH2Cl2 (an important solvent in synthetic chemistry).

Correct AnswerverifiedShow Answer

Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C3H8, burns in excess oxygen to yield carbon dioxide and water vapor at 25 ∘\circ∘ C. BE(C-C) = 347 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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

Arrange the elements C, O, and H in order of increasing electronegativity.

Correct AnswerverifiedShow Answer

A molecule with two resonance structures is shifting quickly back and forth from one structure to the other.

Correct AnswerverifiedShow Answer

The number of lone electron pairs in the ClO4- ion is ___.

Correct AnswerverifiedShow Answer

The electron dot formula for O2 shows

Correct AnswerverifiedShow Answer

What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for the fulminate ion, CNO-, based on minimizing formal charge overall

Correct AnswerverifiedShow Answer

How many resonance phosphate Lewis structures can be drawn for the phosphate ion, PO43-, that obey the octet rule

Correct AnswerverifiedShow Answer

Which of the following ionic solids would have the largest lattice energy

Correct AnswerverifiedShow Answer

Which one of the following molecules has an atom with an incomplete octet

Correct AnswerverifiedShow Answer

Shown here is a Lewis structure for the chlorate ion, ClO3-, that obeys the octet rule, showing all non-zero formal charges. How many resonance structures for ClO3- are possible that obey the octet rule

Correct AnswerverifiedShow Answer

The total number of valence electrons in the ion NH4+ is

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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The bond in F₂ is described as polar covalent.

Correct Answer
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Correct Answer
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The structure below depicts the correct Lewis structure for Dichloromethane, CH₂Cl₂ (an important solvent in synthetic chemistry).

Correct Answer
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Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C₃H₈, burns in excess oxygen to yield carbon dioxide and water vapor at 25^$\circ$C. BE(C-C) = 347 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

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

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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The number of lone electron pairs in the ClO₄^- ion is ___.

Correct Answer
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The electron dot formula for O₂ shows

Correct Answer
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What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for the fulminate ion, CNO^-, based on minimizing formal charge overall

Correct Answer
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How many resonance phosphate Lewis structures can be drawn for the phosphate ion, PO₄^3-, that obey the octet rule

Correct Answer
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Correct Answer
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Correct Answer
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Shown here is a Lewis structure for the chlorate ion, ClO₃^-, that obeys the octet rule, showing all non-zero formal charges. How many resonance structures for ClO₃^- are possible that obey the octet rule

Correct Answer
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The total number of valence electrons in the ion NH₄⁺ is

Correct Answer
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