Question 1

Convert the following structure into a bond-line drawing.

Accepted Answer

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

Question 2

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) None of the above
F) B) and D)

Question 3

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) A) and C)
F) C) and D)

Question 4

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

Accepted Answer

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

Question 5

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 B)
F) None of the above

Question 6

Which of the following bonds has the smallest dipole moment?

Accepted Answer

A)   C-N
B)   C-O
C)   C-F
D)   O-HE) A) and B)
F) A) and C)

Question 7

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 8

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 9

Which of the following compounds is a ketone?

Accepted Answer

A)   CH3CH2COOH
B)   CH3CH2CHO
C)   CH3CH2CH2OH
D)   CH3COCH3E) B) and C)
F) A) and D)

Question 10

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) B) and C)

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) A) and B)
F) A) and C)

Question 12

Which of the following molecules has a molecular dipole?

Accepted Answer

A)   H2O
B)   CO2
C)   HCºCH
D)   Cl2E) B) and D)
F) A) and D)

Question 13

Which of the following molecules has a molecular dipole?

Accepted Answer

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

Question 14

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 D)
F) A) and B)

Question 15

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 16

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) All of the above
F) A) and D)

Question 17

What is the molecular formula of Ritalin, shown below?

Accepted Answer

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

Question 18

Which of the following bonds is the most polar?

Accepted Answer

A)   O-H
B)   C-H
C)   C-C
D)   H-HE) B) and D)
F) A) and D)

Question 19

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) None of the above
F) All of the above

Question 20

Which of the following compounds is a carboxylic ester?

Accepted Answer

A)   CH3CH2COOH
B)   CH3CH2OCH3
C)   CH3CH2COOCH3
D)   CH3CH2COCH3E) A) and D)
F) B) and D)

Exam 1: Covalent Bonding and Shapes of Molecules

What is the molecular formula of Ritalin, shown below?

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

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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 bonds is the most polar?

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

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Which of the following molecules has a molecular dipole?

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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 molecules has a molecular dipole?

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Convert the following structure into a bond-line drawing.

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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 bonds has the smallest dipole moment?

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Which of the following compounds is a carboxylic ester?

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

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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.

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Which of the following compounds is a ketone?

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

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

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Correct Answer
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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).

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

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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.

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