Question 1

Which of the following statements is not true regarding resonance structures?

Accepted Answer

A)   All resonance structures must have the same number of electrons
B)   Each atom in all of the resonance structures must have a complete shell of valence electrons
C)   All resonance structures must have the same arrangement of atoms
D)   All resonance structures must be valid Lewis structuresE) B) and D)
F) None of the above

Question 2

Which of the following is a tertiary (3°)  alcohol?  OH∣OHCH3CCH3OCH3∣∣∣CH3CH2CH2CH2OHCH3CH2CHCH3CH3CH3CHCH31234\begin{array}{cccc}&&\mathrm{OH}\&&|\&\mathrm{OH}&\mathrm{CH}_{3} \mathrm{CCH}_{3}&\mathrm{OCH}_{3}\&|&|&|\\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}&\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHCH}_{3}&\mathrm{CH}_{3}&\mathrm{CH}_{3} \mathrm{CHCH}_{3}\1&2&3&4\end{array}CH3​CH2​CH2​CH2​OH1​OH∣CH3​CH2​CHCH3​2​OH∣CH3​CCH3​∣CH3​3​OCH3​∣CH3​CHCH3​4​

Accepted Answer

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

Question 3

The formal charges in the complex should below are 0 on each H, -1 on N, and +1 on B.

Accepted Answer

A) True 
 B)False

Question 4

Which of the circled bonds is the strongest?

Accepted Answer

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

Question 5

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

Question 6

What is the approximate H−C−O bond angle in formaldehyde, H2C=O?

Accepted Answer

A)   90°
B)   109°
C)   120°
D)   180°E) None of the above
F) B) and C)

Question 7

Which of the following resonance structures is the least important contributor to the resonance hybrid of the acetate anion, CH3COO−? 3COO−?   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 D)
F) B) and D)

Question 8

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

Question 9

Which of the following best represents an sp3 hybridized atomic orbital containing the lone pair of electrons of ammonia, NH3? 3 hybridized atomic orbital containing the lone pair of electrons of ammonia, NH3?   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) C) and D)
F) B) and D)

Question 10

Which of the following compounds is a carboxylic ester?

Accepted Answer

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

Question 11

Which atomic orbitals overlap to form the carbon-carbon σ molecular bonding orbital of ethyne, HC≡CH?

Accepted Answer

A)   C2p + C2p
B)   C2sp + C2sp
C)   C2sp2 + C2sp2
D)   C2sp3 + C2sp3E) All of the above
F) A) and C)

Question 12

What is the molecular formula of aspartame, shown below?

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

Which of the following compounds is a ketone?

Accepted Answer

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

Question 15

Which of the following is a primary amine?

Accepted Answer

A)   CH3CH2NHCH3
B)   CH3CH2NHCH(CH3) 2
C)   CH3CH2N(CH3) 2
D)   (CH3) 3CNH2E) A) and B)
F) All of the above

Question 16

Overlap of the two atomic orbitals as shown could result in the formation of a π bond.

Accepted Answer

A) True 
 B)False

Question 17

In the given ion given, what is the formal charge of nitrogen, carbon, and sulfur, respectively? ​

Accepted Answer

A)   -2, +1, and 0.
B)   0, -2, and +1.
C)   -2, 0, and +1.
D)   +1, 0, and -2.E) All of the above
F) B) and D)

Question 18

Circle all of the sp2 hybridized atoms in the following molecular structure.

Accepted Answer

Exam 1: Covalent Bonding and Shapes of Molecules

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

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

Correct Answer
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The formal charges in the complex should below are 0 on each H, -1 on N, and +1 on B.

Correct Answer
verified

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

Correct Answer
verified

Circle all of the sp² hybridized atoms in the following molecular structure.

Correct Answer
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Which of the following resonance structures is the least important contributor to the resonance hybrid of the acetate anion, CH₃COO−?

Correct Answer
verified

Which atomic orbitals overlap to form the carbon-carbon σ molecular bonding orbital of ethyne, HC≡CH?

Correct Answer
verified

Which of the following is a primary amine?

Correct Answer
verified

In the given ion given, what is the formal charge of nitrogen, carbon, and sulfur, respectively?

Correct Answer
verified

What is the molecular formula of aspartame, shown below?

Correct Answer
verified

What is the approximate H−C−O bond angle in formaldehyde, H₂C=O?

Correct Answer
verified

Which of the following compounds is a carboxylic ester?

Correct Answer
verified

Which of the following compounds is a ketone?

Correct Answer
verified

Overlap of the two atomic orbitals as shown could result in the formation of a π bond.

Correct Answer
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Correct Answer
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Which of the following best represents an sp³ hybridized atomic orbital containing the lone pair of electrons of ammonia, NH₃?

Correct Answer
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Which of the circled bonds is the strongest?

Correct Answer
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Which of the following statements is not true regarding resonance structures?

Correct Answer
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Exam 1: Covalent Bonding and Shapes of Molecules

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The formal charges in the complex should below are 0 on each H, -1 on N, and +1 on B.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Circle all of the sp2 hybridized atoms in the following molecular structure.

Correct AnswerverifiedShow Answer

Which of the following resonance structures is the least important contributor to the resonance hybrid of the acetate anion, CH3COO−?

Correct AnswerverifiedShow Answer

Which atomic orbitals overlap to form the carbon-carbon σ molecular bonding orbital of ethyne, HC≡CH?

Correct AnswerverifiedShow Answer

Which of the following is a primary amine?

Correct AnswerverifiedShow Answer

In the given ion given, what is the formal charge of nitrogen, carbon, and sulfur, respectively? ​

Correct AnswerverifiedShow Answer

What is the molecular formula of aspartame, shown below?

Correct AnswerverifiedShow Answer

What is the approximate H−C−O bond angle in formaldehyde, H2C=O?

Correct AnswerverifiedShow Answer

Which of the following compounds is a carboxylic ester?

Correct AnswerverifiedShow Answer

Which of the following compounds is a ketone?

Correct AnswerverifiedShow Answer

Overlap of the two atomic orbitals as shown could result in the formation of a π bond.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following best represents an sp3 hybridized atomic orbital containing the lone pair of electrons of ammonia, NH3?

Correct AnswerverifiedShow Answer

Which of the circled bonds is the strongest?

Correct AnswerverifiedShow Answer

Which of the following statements is not true regarding resonance structures?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Circle all of the sp² hybridized atoms in the following molecular structure.

Correct Answer
verified

Which of the following resonance structures is the least important contributor to the resonance hybrid of the acetate anion, CH₃COO−?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In the given ion given, what is the formal charge of nitrogen, carbon, and sulfur, respectively?

Correct Answer
verified

Correct Answer
verified

What is the approximate H−C−O bond angle in formaldehyde, H₂C=O?

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Which of the following best represents an sp³ hybridized atomic orbital containing the lone pair of electrons of ammonia, NH₃?

Correct Answer
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Correct Answer
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Correct Answer
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