Question 1

Provide a Lewis structure for a molecule with molecular formula CH2O2.

Accepted Answer

Question 2

How many carbon atoms are present in the molecule shown?

Accepted Answer

A)  6 
B)  8 
C)  10 
D)  11 
E)  12 
A)  6 
B)  8 
C)  10 
D)  11 
E)  12

Question 3

Which sequence correctly ranks the indicated protons in order of increasing acidity?

Accepted Answer

A)  1 < 2 < 3 
B)  2 < 3 < 1 
C)  3 < 1 < 2 
D)  2 < 1 < 3 
E)  1 < 3 < 2 
A)  1 < 2 < 3 
B)  2 < 3 < 1 
C)  3 < 1 < 2 
D)  2 < 1 < 3 
E)  1 < 3 < 2

Question 4

Provide the structure of the conjugate acid of ethanamine (CH3CH2NH2)

Accepted Answer

Question 5

Which of the following choices represent(s) a pair of resonance forms?

Accepted Answer

A) 
  
B) 
  
C) 
  
D)  both A and C 
E)  both B and C 
A) 
  
B) 
  
C) 
  
D)  both A and C 
E)  both B and C

Question 6

Structures ________, shown below, are resonance structures, and structure ________ is the major contributor to the overall resonance hybrid.

Accepted Answer

A)  2 & 4; 2 
B)  1, 3 & 5; 3 
C)  4 & 6; 6 
D)  1, 3 & 5; 1 
E)  1, 3, 4 & 5; 3 
A)  2 & 4; 2 
B)  1, 3 & 5; 3 
C)  4 & 6; 6 
D)  1, 3 & 5; 1 
E)  1, 3, 4 & 5; 3

Question 7

Draw the shape of a 2p orbital.

Accepted Answer

The answer of Draw the shape of a 2p orbital....

Question 8

Which of the following pairs of bases lists the stronger base first?

Accepted Answer

A)  I- > Cl- 
B)  H2O > HO- 
C)  HO- > H2N- 
D)  CH3COO- > HO- 
E)  H2N- > CH3COO- 
A)  I- > Cl- 
B)  H2O > HO- 
C)  HO- > H2N- 
D)  CH3COO- > HO- 
E)  H2N- > CH3COO-

Question 9

A sample of compound X is subjected to elemental analysis and the following percentages by weight are found: 39.97% C, 6.73% H, and 53.30% O. The molecular weight of X is 90. What is the empirical formula of X?

Accepted Answer

A)  C6HO8 
B)  C2H4O2 
C)  C4H10O2 
D)  C3H6O3 
E)  CH2O 
A)  C6HO8 
B)  C2H4O2 
C)  C4H10O2 
D)  C3H6O3 
E)  CH2O

Question 10

Complete the following chemical reaction and predict whether the equilibrium will favor the reactants of products:

Accepted Answer

@#IMG-DLM& The stronger acid and the str

Question 11

In the compound sodium methoxide (NaOCH3), there is ________ bonding.

Accepted Answer

A)  ionic 
B)  polar covalent 
C)  nonpolar covalent 
D)  a mixture of ionic and covalent 
E)  resonance stabilized 
A)  ionic 
B)  polar covalent 
C)  nonpolar covalent 
D)  a mixture of ionic and covalent 
E)  resonance stabilized

Question 12

Which of the following structures (a-d) is another resonance structure of the following organic molecule?

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 13

The element with the electronic configuration 1s22s22p63s1 is ________.

Accepted Answer

Question 14

Rank the following compounds in order of increasing acidity: CH3OH, HCl, NH3, and CH4.

Accepted Answer

CH₄ < NH₃ <

Question 15

Calculate the pH of a 100 mL aqueous solution containing 1.80 g of KOH (MW = 56.11 g/mol).

Accepted Answer

The answer of Calculate the pH of a 100 mL...

Question 16

Which of the following acids has the most stable conjugate base?

Accepted Answer

A)  CH3CO2H 
B)  CH3CHO 
C)  CH3CH2OH 
D)  CH3CH2SH 
E)  CH3SO3H 
A)  CH3CO2H 
B)  CH3CHO 
C)  CH3CH2OH 
D)  CH3CH2SH 
E)  CH3SO3H

Question 17

According to the Lewis definition, which of the following may act as acids?

Accepted Answer

A)  NH3 
B)  HCl 
C)  AlCl3 
D)  A & B 
E)  A, B, & C 
A)  NH3 
B)  HCl 
C)  AlCl3 
D)  A & B 
E)  A, B, & C

Question 18

The electron density of ________ orbitals has spherical symmetry.

Accepted Answer

The answer of The electron density of ________ orbitals has...

Question 19

The Lewis structure of trimethylamine is shown below. Draw the condensed structural formula which corresponds to this Lewis structure.

Accepted Answer

The answer of The Lewis structure of trimethylamine is shown...

Question 20

Draw 3 significant resonance structures for the compound shown below. Place a box around the major contributor. Fill in any missing formal charges.

Accepted Answer

The answer of Draw 3 significant resonance structures for the...

Exam 1: Introduction and Review

Provide a Lewis structure for a molecule with molecular formula CH2O2.

How many carbon atoms are present in the molecule shown?

Which sequence correctly ranks the indicated protons in order of increasing acidity?

Provide the structure of the conjugate acid of ethanamine (CH3CH2NH2)

Which of the following choices represent(s) a pair of resonance forms?

Structures ________, shown below, are resonance structures, and structure ________ is the major contributor to the overall resonance hybrid.

Draw the shape of a 2p orbital.

Which of the following pairs of bases lists the stronger base first?

A sample of compound X is subjected to elemental analysis and the following percentages by weight are found: 39.97% C, 6.73% H, and 53.30% O. The molecular weight of X is 90. What is the empirical formula of X?

Complete the following chemical reaction and predict whether the equilibrium will favor the reactants of products:

In the compound sodium methoxide (NaOCH3), there is ________ bonding.

Which of the following structures (a-d) is another resonance structure of the following organic molecule?

The element with the electronic configuration 1s22s22p63s1 is ________.

Rank the following compounds in order of increasing acidity: CH3OH, HCl, NH3, and CH4.

Calculate the pH of a 100 mL aqueous solution containing 1.80 g of KOH (MW = 56.11 g/mol).

Which of the following acids has the most stable conjugate base?

According to the Lewis definition, which of the following may act as acids?

The electron density of ________ orbitals has spherical symmetry.

The Lewis structure of trimethylamine is shown below. Draw the condensed structural formula which corresponds to this Lewis structure.

Draw 3 significant resonance structures for the compound shown below. Place a box around the major contributor. Fill in any missing formal charges.

Structure and Properties of Organic Molecules

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides: Nucleophilic Substitution and Elimination

Structure and Synthesis of Alkenes

Reactions of Alkenes

Alkynes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

Provide a Lewis structure for a molecule with molecular formula CH₂O₂.

Provide the structure of the conjugate acid of ethanamine (CH₃CH₂NH₂)

Structures , shown below, are resonance structures, and structure is the major contributor to the overall resonance hybrid.

The element with the electronic configuration 1s²2s²2p⁶3s¹ is ________.

Rank the following compounds in order of increasing acidity: CH₃OH, HCl, NH₃, and CH₄.