Question 1

In which of the following does the nitrogen atom have a formal charge of -1?

Accepted Answer

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

Question 2

Predict the ideal bond angles in GeCl4 using the molecular shape given by the VSEPR theory.

Accepted Answer

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

Question 3

According to VSEPR theory, a molecule with the general formula AX4E will have a _____ molecular shape.

Accepted Answer

A)   bent
B)   see-saw
C)   trigonal planar
D)   T-shaped
E)   square planarF) A) and B)
G) A) and D)

Question 4

How many faces and how many vertexes (corners) , respectively, are there in a trigonal bipyramid?

Accepted Answer

A)   4 and 4
B)   5 and 5
C)   5 and 6
D)   6 and 5
E)   6 and 8F) B) and C)
G) All of the above

Question 5

Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO2-, carbon is the central atom) to illustrate.

Accepted Answer

The concept is resonance. In this situat...

Question 6

According to VSEPR theory, a molecule with the general formula AX4E2 will have a _____ molecular shape.

Accepted Answer

A)   tetrahedral
B)   square pyramidal
C)   square planar
D)   octahedral
E)   see-sawF) C) and D)
G) A) and E)

Question 7

All possible resonance structures contribute equally to the resonance hybrid.

Accepted Answer

A) True 
 B)False

Question 8

Select the Lewis structure in which formal charges are minimized for the periodate anion, IO4-.

Accepted Answer

A)   4-. 
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B)   4-. 
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C)   4-. 
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D)   4-. 
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E)   4-. 
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G) A) and D)

Question 9

Predict the ideal bond angles in IF2- using the molecular shape given by the VSEPR theory.

Accepted Answer

A)   60°
B)   90°
C)   109°
D)   120°
E)   180°F) B) and C)
G) A) and E)

Question 10

In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) A) and C)
G) All of the above

Question 11

According to VSEPR theory, a molecule with the general formula AX2E will have a ______ molecular shape.

Accepted Answer

A)   bent
B)   see-saw
C)   trigonal planar
D)   T-shaped
E)   trigonal pyramidalF) A) and E)
G) A) and B)

Question 12

The Lewis structure of NO2 violates the octet rule.

Accepted Answer

A) True 
 B)False

Question 13

For the chlorate ion, ClO3-, draw two different valid Lewis structures, as follows:
a. a structure in which the octet rule is obeyed
b. a structure in which formal charges are minimized

Accepted Answer

A)11ec6d41_55eb_0544_9cd1_2df...

Question 14

In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

Accepted Answer

A)   5 and 6
B)   4 and 2
C)   3 and 6
D)   4 and 6
E)   3 and 2F) None of the above
G) A) and D)

Question 15

What is the molecular symmetry around the carbons in CCl2CH2 as predicted by the VSEPR theory?

Accepted Answer

A)   linear
B)   trigonal planar
C)   V-shaped
D)   tetrahedral
E)   trigonal pyramidalF) A) and C)
G) None of the above

Question 16

According to VSEPR theory, a molecule with the general formula AX3E will have a _____ molecular shape.

Accepted Answer

A)   bent
B)   trigonal planar
C)   trigonal pyramidal
D)   tetrahedral
E)   triangularF) A) and E)
G) B) and E)

Question 17

What is the molecular shape of NH2Cl as predicted by the VSEPR theory?

Accepted Answer

A)   trigonal pyramidal
B)   tetrahedral
C)   T-shaped
D)   see-saw
E)   trigonal planarF) A) and B)
G) B) and E)

Question 18

What is the molecular shape of ClCN as predicted by the VSEPR theory? (Carbon is the central atom.)

Accepted Answer

A)   linear
B)   bent
C)   angular
D)   trigonal
E)   none of the aboveF) B) and E)
G) B) and D)

Question 19

Which of the following molecules has a net dipole moment?

Accepted Answer

A)   BeCl2
B)   SF2
C)   KrF2
D)   CO2
E)   CCl4F) B) and C)
G) C) and D)

Question 20

The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?

Accepted Answer

A)   2 single, 4 double
B)   4 single, 2 double
C)   4 single, no double
D)   6 single, no double
E)   5 single, 1 doubleF) B) and D)
G) A) and E)

Exam 10: The Shapes of Molecules

Select the Lewis structure in which formal charges are minimized for the periodate anion, IO4-.

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All possible resonance structures contribute equally to the resonance hybrid.

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In which of the following does the nitrogen atom have a formal charge of -1?

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Predict the ideal bond angles in GeCl4 using the molecular shape given by the VSEPR theory.

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What is the molecular shape of NH2Cl as predicted by the VSEPR theory?

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The Lewis structure of NO2 violates the octet rule.

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According to VSEPR theory, a molecule with the general formula AX3E will have a _____ molecular shape.

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Which of the following molecules has a net dipole moment?

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The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?

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For the chlorate ion, ClO3-, draw two different valid Lewis structures, as follows: a. a structure in which the octet rule is obeyed b. a structure in which formal charges are minimized

Correct AnswerverifiedA)11ec6d41_55eb_0544_9cd1_2df...View AnswerShow Answer

According to VSEPR theory, a molecule with the general formula AX4E will have a _____ molecular shape.

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What is the molecular shape of ClCN as predicted by the VSEPR theory? (Carbon is the central atom.)

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How many faces and how many vertexes (corners) , respectively, are there in a trigonal bipyramid?

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According to VSEPR theory, a molecule with the general formula AX2E will have a ______ molecular shape.

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In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

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What is the molecular symmetry around the carbons in CCl2CH2 as predicted by the VSEPR theory?

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Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO2-, carbon is the central atom) to illustrate.

Correct AnswerverifiedThe concept is resonance. In this situat...View AnswerShow Answer

In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?

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According to VSEPR theory, a molecule with the general formula AX4E2 will have a _____ molecular shape.

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Predict the ideal bond angles in IF2- using the molecular shape given by the VSEPR theory.

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Select the Lewis structure in which formal charges are minimized for the periodate anion, IO₄^-.

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Predict the ideal bond angles in GeCl₄using the molecular shape given by the VSEPR theory.

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What is the molecular shape of NH₂Cl as predicted by the VSEPR theory?

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The Lewis structure of NO₂ violates the octet rule.

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According to VSEPR theory, a molecule with the general formula AX₃E will have a _____ molecular shape.

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For the chlorate ion, ClO₃^-, draw two different valid Lewis structures, as follows: a. a structure in which the octet rule is obeyed b. a structure in which formal charges are minimized

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₄E will have a _____ molecular shape.

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According to VSEPR theory, a molecule with the general formula AX₂E will have a ______ molecular shape.

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What is the molecular symmetry around the carbons in CCl₂CH₂as predicted by the VSEPR theory?

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Name and outline the concept which is introduced when more than one valid Lewis structure can be drawn for a given molecule or ion. Use appropriate diagrams of the formate ion (HCO₂^-, carbon is the central atom) to illustrate.

Correct Answer
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The concept is resonance. In this situat...
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According to VSEPR theory, a molecule with the general formula AX₄E₂will have a _____ molecular shape.

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Predict the ideal bond angles in IF₂^-using the molecular shape given by the VSEPR theory.

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