Question 1

Which of the following is the correct Lewis structure of IF3?

Accepted Answer

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

Question 2

The molecular geometry of a molecule whose central atom has four single bonds and one lone pair of electrons is ________.

Accepted Answer

trigonal-b...

Question 3

Based on the following data, what is the F-F bond energy? 
 12H2( g) +12 F2( g) →HF(g) ;ΔrH=−272.5 kJ/mol−rxn{ }^{\frac{1}{2}} \mathrm{H}_{2}(\mathrm{~g}) +{ }^{\frac{1}{2}} \mathrm{~F}_{2}(\mathrm{~g})  ightarrow \mathrm{HF}(\mathrm{g})  ; \Delta_{r} H=-272.5 \mathrm{~kJ} / \mathrm{mol}-\mathrm{rxn}21​H2​( g) +21​ F2​( g) →HF(g) ;Δr​H=−272.5 kJ/mol−rxn

BondBond Energy(kJ/mol)  H-H 435 H-F 565\begin{array}{ll}Bond &Bond~Energy(kJ/mol) \	ext { H-H } & 435 \	ext { H-F } & 565\end{array}Bond H-H  H-F ​Bond Energy(kJ/mol) 435565​

Accepted Answer

A)   500 kJ/mol
B)   150 kJ/mol
C)   -150 kJ/mol
D)   -695 kJ/mol
E)   695 kJ/mol F) D) and E)
G) A) and C)

Question 4

Which of the following is a correct Lewis structure for H2SO4?

Accepted Answer

A)   2SO4? 
A)     
B)     
C)     
D)     
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B)   2SO4? 
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B)     
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C)   2SO4? 
A)     
B)     
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D)   2SO4? 
A)     
B)     
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E)   2SO4? 
A)     
B)     
C)     
D)     
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G) B) and C)

Question 5

The Lewis structure of which of the following molecules violates the octet rule?

Accepted Answer

A)   SF4
B)   NF3
C)   OF2
D)   HF
E)   SiF4F) D) and E)
G) C) and D)

Question 6

How many lone pairs of electrons are assigned to the carbon atom in CO?

Accepted Answer

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

Question 7

When you draw the Lewis structure for PF2Cl3, how many single bonds, double bonds, and lone pair electrons reside on the central phosphorus atom?

Accepted Answer

A)   5 single bonds, 0 double bonds, 0 lone pairs
B)   4 single bonds, 1 double bond, 0 lone pairs
C)   5 single bonds, 0 double bonds, 1 lone pair
D)   4 single bonds, 1 double bond, 1 lone pair
E)   3 single bonds, 2 double bonds, 0 lone pairsF) B) and D)
G) All of the above

Question 8

Which of the following pairs of compounds contains ionic bonds?

Accepted Answer

A)   KI and O3
B)   NaF and H2O
C)   PCl5 and HF
D)   Na2SO3 and BH3
E)   RbBr and MgSF) A) and B)
G) A) and E)

Question 9

Which combination of atoms is most likely to produce a compound with covalent bonds?

Accepted Answer

A)   K and Br
B)   Al and S
C)   S and Cl
D)   Sn and F
E)   Li and IF) A) and B)
G) A) and C)

Question 10

Which of the following species has a Lewis structure similar to iodine tetrafluoride, IF4-?

Accepted Answer

A)   XeF4
B)   SO42-
C)   PF4+
D)   SF4
E)   IO4-F) A) and B)
G) B) and E)

Question 11

What is the bond angle in a trigonal planar molecule or ion?

Accepted Answer

A)   109°
B)   180°
C)   90°
D)   72°
E)   120°F) A) and E)
G) C) and E)

Question 12

Atoms having equal or nearly equal electronegativities are expected to form

Accepted Answer

A)   no bonds
B)   polar covalent bonds
C)   nonpolar covalent bonds
D)   ionic bonds
E)   covalent bondsF) C) and E)
G) C) and D)

Question 13

Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene, C2H2.

Accepted Answer

A)   linear
B)   bent
C)   trigonal-planar
D)   tetrahedral
E)   octahedralF) A) and E)
G) B) and E)

Question 14

Which of the following compounds has polar covalent bonds: CCl4, Cl2, HCl, and KCl?

Accepted Answer

A)   CCl4 only
B)   Cl2 only
C)   HCl and KCl
D)   Cl2 and KCl
E)   CCl4 and HClF) A) and B)
G) All of the above

Question 15

Which of the following bonds would be the most polar?

Accepted Answer

A)   N--C
B)   N--Si
C)   N--P
D)   N--Al
E)   N--GaF) A) and C)
G) A) and B)

Question 16

Using the following data reactions: ΔH∘(kJ/ mol-rxn)  H2(g) +Cl2(g) →2HCl(g) −184H2(g) →2H(g) 432Cl2(g) →2Cl(g) 239\begin{array} { l l } & \Delta H ^ { \circ } ( \mathrm { kJ } / 	ext { mol-rxn)  } \\mathrm { H } _ { 2 } ( g )  + \mathrm { Cl } _ { 2 } ( g )  ightarrow 2 \mathrm { HCl } ( g )  & - 184 \\mathrm { H } _ { 2 } ( g )  ightarrow 2 \mathrm { H } ( g )  & 432 \\mathrm { Cl } _ { 2 } ( g )  ightarrow 2 \mathrm { Cl } ( g )  & 239\end{array}H2​(g) +Cl2​(g) →2HCl(g) H2​(g) →2H(g) Cl2​(g) →2Cl(g) ​ΔH∘(kJ/ mol-rxn)  −184432239​ 
Calculate the energy of an H-Cl bond.

Accepted Answer

A)   92 kJ/mol
B)   855 kJ/mol
C)   487 kJ/mol
D)   428 kJ/mol
E)   244 kJ/mol F) A) and C)
G) All of the above

Question 17

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of nitrogen trichloride, NCl3.

Accepted Answer

A)   The electron-pair geometry is linear, the molecular geometry is linear.
B)   The electron-pair geometry is trigonal-planar, the molecular geometry is trigonal-planar.
C)   The electron-pair geometry is trigonal-planar, the molecular geometry is bent.
D)   The electron-pair geometry is tetrahedral, the molecular geometry is tetrahedral.
E)   The electron-pair geometry is tetrahedral, the molecular geometry is trigonal-pyramidal.F) B) and D)
G) A) and B)

Question 18

How many hydrogen atoms are needed to complete the following hydrocarbon structure?

Accepted Answer

A)   10
B)   12
C)   8
D)   14
E)   6F) B) and E)
G) B) and D)

Question 19

In benzene, C6H6, the six carbon atoms are arranged in a ring. Two equivalent Lewis structures can be drawn for benzene. In both structures, the carbon atoms have a trigonal planar geometry. These two equivalent structures are referred to as ________ structures.

Accepted Answer

Question 20

What is the total number of electrons (both lone and bond pairs)  in the Lewis structure of SO42-?

Accepted Answer

A)   18
B)   20
C)   32
D)   24
E)   22F) A) and B)
G) C) and E)

Exam 9: Bonding and Molecular Structure

Which of the following compounds has polar covalent bonds: CCl₄, Cl₂, HCl, and KCl?

Correct Answer
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Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of nitrogen trichloride, NCl₃.

Correct Answer
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Which of the following is a correct Lewis structure for H₂SO₄?

Correct Answer
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Correct Answer
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What is the bond angle in a trigonal planar molecule or ion?

Correct Answer
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The molecular geometry of a molecule whose central atom has four single bonds and one lone pair of electrons is ________.

Correct Answer
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trigonal-b...
View Answer

What is the total number of electrons (both lone and bond pairs) in the Lewis structure of SO₄2-?

Correct Answer
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How many lone pairs of electrons are assigned to the carbon atom in CO?

Correct Answer
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Which of the following pairs of compounds contains ionic bonds?

Correct Answer
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Atoms having equal or nearly equal electronegativities are expected to form

Correct Answer
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Which combination of atoms is most likely to produce a compound with covalent bonds?

Correct Answer
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How many hydrogen atoms are needed to complete the following hydrocarbon structure?

Correct Answer
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Which of the following is the correct Lewis structure of IF₃?

Correct Answer
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Which of the following bonds would be the most polar?

Correct Answer
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Correct Answer
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Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene, C₂H₂.

Correct Answer
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When you draw the Lewis structure for PF₂Cl₃, how many single bonds, double bonds, and lone pair electrons reside on the central phosphorus atom?

Correct Answer
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Which of the following species has a Lewis structure similar to iodine tetrafluoride, IF₄^-?

Correct Answer
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The Lewis structure of which of the following molecules violates the octet rule?

Correct Answer
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In benzene, C₆H₆, the six carbon atoms are arranged in a ring. Two equivalent Lewis structures can be drawn for benzene. In both structures, the carbon atoms have a trigonal planar geometry. These two equivalent structures are referred to as ________ structures.

Correct Answer
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Exam 9: Bonding and Molecular Structure

Which of the following compounds has polar covalent bonds: CCl4, Cl2, HCl, and KCl?

Correct AnswerverifiedShow Answer

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of nitrogen trichloride, NCl3.

Correct AnswerverifiedShow Answer

Which of the following is a correct Lewis structure for H2SO4?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the bond angle in a trigonal planar molecule or ion?

Correct AnswerverifiedShow Answer

The molecular geometry of a molecule whose central atom has four single bonds and one lone pair of electrons is ________.

Correct Answerverifiedtrigonal-b...View AnswerShow Answer

What is the total number of electrons (both lone and bond pairs) in the Lewis structure of SO42-?

Correct AnswerverifiedShow Answer

How many lone pairs of electrons are assigned to the carbon atom in CO?

Correct AnswerverifiedShow Answer

Which of the following pairs of compounds contains ionic bonds?

Correct AnswerverifiedShow Answer

Atoms having equal or nearly equal electronegativities are expected to form

Correct AnswerverifiedShow Answer

Which combination of atoms is most likely to produce a compound with covalent bonds?

Correct AnswerverifiedShow Answer

How many hydrogen atoms are needed to complete the following hydrocarbon structure?

Correct AnswerverifiedShow Answer

Which of the following is the correct Lewis structure of IF3?

Correct AnswerverifiedShow Answer

Which of the following bonds would be the most polar?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene, C2H2.

Correct AnswerverifiedShow Answer

When you draw the Lewis structure for PF2Cl3, how many single bonds, double bonds, and lone pair electrons reside on the central phosphorus atom?

Correct AnswerverifiedShow Answer

Which of the following species has a Lewis structure similar to iodine tetrafluoride, IF4-?

Correct AnswerverifiedShow Answer

The Lewis structure of which of the following molecules violates the octet rule?

Correct AnswerverifiedShow Answer

In benzene, C6H6, the six carbon atoms are arranged in a ring. Two equivalent Lewis structures can be drawn for benzene. In both structures, the carbon atoms have a trigonal planar geometry. These two equivalent structures are referred to as ________ structures.

Correct AnswerverifiedShow Answer

Which of the following compounds has polar covalent bonds: CCl₄, Cl₂, HCl, and KCl?

Correct Answer
verified

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of nitrogen trichloride, NCl₃.

Correct Answer
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Which of the following is a correct Lewis structure for H₂SO₄?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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trigonal-b...
View Answer

What is the total number of electrons (both lone and bond pairs) in the Lewis structure of SO₄2-?

Correct Answer
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Correct Answer
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Correct Answer
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Which of the following is the correct Lewis structure of IF₃?

Correct Answer
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Correct Answer
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Use VSEPR theory to predict the molecular geometry around either carbon atom in acetylene, C₂H₂.

Correct Answer
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When you draw the Lewis structure for PF₂Cl₃, how many single bonds, double bonds, and lone pair electrons reside on the central phosphorus atom?

Correct Answer
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Which of the following species has a Lewis structure similar to iodine tetrafluoride, IF₄^-?

Correct Answer
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Correct Answer
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In benzene, C₆H₆, the six carbon atoms are arranged in a ring. Two equivalent Lewis structures can be drawn for benzene. In both structures, the carbon atoms have a trigonal planar geometry. These two equivalent structures are referred to as ________ structures.

Correct Answer
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