Question 1

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H2O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Accepted Answer

Question 2

What is the molecular formula of Ritalin, shown below?

Accepted Answer

The answer of What is the molecular formula of Ritalin,...

Question 3

Convert the following structure into a bond-line drawing.

Accepted Answer

The answer of Convert the following structure into a bond-line...

Question 4

Which of the following bonds has the smallest dipole moment?

Accepted Answer

A)   C-N
B)   C-O
C)   C-F
D)   O-HE) B) and D)
F) None of the above

Question 5

Which of the following molecules has a molecular dipole?

Accepted Answer

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

Question 6

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Accepted Answer

Question 7

Which of the following compounds is a ketone?

Accepted Answer

A)   CH3CH2COOH
B)   CH3CH2CHO
C)   CH3CH2CH2OH
D)   CH3COCH3E) A) and C)
F) All of the above

Question 8

Which of the following resonance structures makes the largest contribution to the structure of [H2CCHO] -? 2CCHO] -?   A)  1 B)  2 C)  3 D)  4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 9

Which of the following compounds is a carboxylic ester?

Accepted Answer

A)   CH3CH2COOH
B)   CH3CH2OCH3
C)   CH3CH2COOCH3
D)   CH3CH2COCH3E) B) and D)
F) None of the above

Question 10

Which of the following bonds is the most polar?

Accepted Answer

A)   O-H
B)   C-H
C)   C-C
D)   H-HE) A) and B)
F) None of the above

Question 11

Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H2C=CH2?

Accepted Answer

A)   C2p + H1s
B)   C2sp + H1s
C)   C2sp2 + H1s
D)   C2sp3 + H1sE) B) and D)
F) A) and D)

Question 12

Which atomic orbitals overlap to form the carbon-carbon s molecular bonding orbital of ethyne, HCºCH?

Accepted Answer

A)   C2p + C2p
B)   C2sp + C2sp
C)   C2sp2 + C2sp2
D)   C2sp3 + C2sp3E) B) and D)
F) B) and C)

Question 13

How many electrons can the shell with a principal quantum number of 1 hold?

Accepted Answer

A)   1
B)   2
C)   4
D)   8E) C) and D)
F) A) and C)

Question 14

What is the ground-state electronic configuration of a nitrogen atom (nitrogen: atomic number 7) ?

Accepted Answer

A)   1s22s12p4
B)   1s22s22p3
C)   1s12s12p5
D)   1s22s22p2E) A) and D)
F) B) and C)

Question 15

Which of the following best represents the shape of a 2p atomic orbital of carbon?

Accepted Answer

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

Question 16

Which of the following shows curved arrows that correctly accounts for the differences between the two structures?

Accepted Answer

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

Question 17

Which of the following molecules has a molecular dipole?

Accepted Answer

A)   H2O
B)   CO2
C)   HCºCH
D)   Cl2E) None of the above
F) A) and D)

Question 18

How many electrons can the shell with a principal quantum number of 2 hold?

Accepted Answer

A)   1
B)   2
C)   4
D)   8E) All of the above
F) B) and D)

Question 19

Which of the following best represents an sp2 hybridized atomic orbital of carbon which overlaps with the 1s atomic orbital of hydrogen to form a C-H s bonding molecular orbital in ethene, H2C=CH2  2 hybridized atomic orbital of carbon which overlaps with the 1s atomic orbital of hydrogen to form a C-H s bonding molecular orbital in ethene, H2C=CH2    A)  1 B)  2 C)  3 D)  4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 20

Which of the following is trigonal planar?

Accepted Answer

A)   boron trifluoride, BF3
B)   methyl anion, CH3-
C)   methane, CH4
D)   ammonia, NH3E) A) and D)
F) B) and D)

Exam 1: Covalent Bonding and Shapes of Molecules

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H2O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

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Which of the following molecules has a molecular dipole?

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Which of the following molecules has a molecular dipole?

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Convert the following structure into a bond-line drawing.

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Which of the following best represents an sp2 hybridized atomic orbital of carbon which overlaps with the 1s atomic orbital of hydrogen to form a C-H s bonding molecular orbital in ethene, H2C=CH2

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How many electrons can the shell with a principal quantum number of 1 hold?

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Which of the following resonance structures makes the largest contribution to the structure of [H2CCHO] -?

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Which atomic orbitals overlap to form the carbon-carbon s molecular bonding orbital of ethyne, HCºCH?

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

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Which of the following compounds is a ketone?

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What is the molecular formula of Ritalin, shown below?

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Which of the following bonds is the most polar?

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Which of the following best represents the shape of a 2p atomic orbital of carbon?

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Which of the following bonds has the smallest dipole moment?

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Which of the following compounds is a carboxylic ester?

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Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H2C=CH2?

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How many electrons can the shell with a principal quantum number of 2 hold?

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What is the ground-state electronic configuration of a nitrogen atom (nitrogen: atomic number 7) ?

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Which of the following is trigonal planar?

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Which of the following shows curved arrows that correctly accounts for the differences between the two structures?

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Correct Answer
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Which of the following best represents an sp² hybridized atomic orbital of carbon which overlaps with the 1s atomic orbital of hydrogen to form a C-H s bonding molecular orbital in ethene, H₂C=CH₂

Correct Answer
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Which of the following resonance structures makes the largest contribution to the structure of [H₂CCHO]^-?

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Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HCºCH). Label each bond (e.g., C-H s bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

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Which atomic orbitals overlap to form the carbon-hydrogen s bonding molecular orbitals of ethene, H₂C=CH₂?

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