Question 1

How many electron groups are found on the carbon and the nitrogen methylamine (CH5N)?

Accepted Answer

A)  They both have four. 
B)  Carbon has four and nitrogen has five. 
C)  Nitrogen has five and carbon has four. 
D)  Carbon has three and nitrogen has four. 
E)  Nitrogen has three and carbon has four. 
A)  They both have four. 
B)  Carbon has four and nitrogen has five. 
C)  Nitrogen has five and carbon has four. 
D)  Carbon has three and nitrogen has four. 
E)  Nitrogen has three and carbon has four.

Question 2

An atom in a molecule has two lone pairs and two atoms bonded to it. What is the molecular shape of this atom?

Accepted Answer

A)  linear 
B)  bent 
C)  trigonal planar 
D)  trigonal pyramidal 
E)  tetrahedral 
A)  linear 
B)  bent 
C)  trigonal planar 
D)  trigonal pyramidal 
E)  tetrahedral

Question 3

Which of the molecules below exhibits hydrogen-bonding forces between like molecules?

Accepted Answer

A)  A only 
B)  A and B 
C)  A, B, and C 
D)  A, B, C, and D 
E)  E only 
A)  A only 
B)  A and B 
C)  A, B, and C 
D)  A, B, C, and D 
E)  E only

Question 4

Does formaldehyde have a permanent dipole?

Accepted Answer

A)  Yes, the carbon is partially negative and the oxygen is partially positive. 
B)  Yes, the carbon is partially negative and the hydrogen is partially positive. 
C)  Yes, the carbon is partially positive and the oxygen is partially negative. 
D)  Yes, the carbon is partially positive and the hydrogen is partially negative. 
E)  No, formaldehyde only has a temporary dipole. 
A)  Yes, the carbon is partially negative and the oxygen is partially positive. 
B)  Yes, the carbon is partially negative and the hydrogen is partially positive. 
C)  Yes, the carbon is partially positive and the oxygen is partially negative. 
D)  Yes, the carbon is partially positive and the hydrogen is partially negative. 
E)  No, formaldehyde only has a temporary dipole.

Question 5

What is the name of CS2, an industrial solvent?

Accepted Answer

A)  carbon sulfite 
B)  carbon sulfide 
C)  carbon disulfide 
D)  carbon sulfur 
E)  carbon disulfur 
A)  carbon sulfite 
B)  carbon sulfide 
C)  carbon disulfide 
D)  carbon sulfur 
E)  carbon disulfur

Question 6

What is meant by the following symbols?

Accepted Answer

A)  This means that the hydrogen has donated an electron to the oxygen. 
B)  This means that the oxygen has donated an electron to the hydrogen. 
C)  This means that the oxygen is pulling electrons toward itself and is partially negative. 
D)  This means that the hydrogen is pulling electrons toward itself and is partially positive. 
E)  These are not symbols used in chemistry. 
A)  This means that the hydrogen has donated an electron to the oxygen. 
B)  This means that the oxygen has donated an electron to the hydrogen. 
C)  This means that the oxygen is pulling electrons toward itself and is partially negative. 
D)  This means that the hydrogen is pulling electrons toward itself and is partially positive. 
E)  These are not symbols used in chemistry.

Question 7

What is the meaning of the symbol below? [PO4]3-

Accepted Answer

A)  The phosphorous has three more electrons than protons. 
B)  Three oxygens each have one more electron than protons. 
C)  Each of the four oxygens has three more electrons than protons. 
D)  The ion has three more electrons than protons. 
E)  The 3F1F1F1S1F1F1F10 means that the molecule has lost three electrons. 
A)  The phosphorous has three more electrons than protons. 
B)  Three oxygens each have one more electron than protons. 
C)  Each of the four oxygens has three more electrons than protons. 
D)  The ion has three more electrons than protons. 
E)  The 3F1F1F1S1F1F1F10 means that the molecule has lost three electrons.

Question 8

How many lone pairs are on the carbon in dichloromethane (CH2Cl2)?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 9

Which of the molecules exhibits the strongest intermolecular forces of attraction?

Accepted Answer

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

Question 10

In this model of ethane, the dark grey balls represent _______ and the white balls represent _______.

Accepted Answer

A)  nitrogen; hydrogen 
B)  oxygen; hydrogen 
C)  hydrogen; oxygen 
D)  carbon; hydrogen 
E)  hydrogen; carbon 
A)  nitrogen; hydrogen 
B)  oxygen; hydrogen 
C)  hydrogen; oxygen 
D)  carbon; hydrogen 
E)  hydrogen; carbon

Question 11

In a covalent molecule,

Accepted Answer

A)  nonmetals share electrons. 
B)  nonmetals donate electrons to metals. 
C)  metals donate electrons to nonmetals. 
D)  metals share electrons. 
E)  cations and anions are attracted to one another. 
A)  nonmetals share electrons. 
B)  nonmetals donate electrons to metals. 
C)  metals donate electrons to nonmetals. 
D)  metals share electrons. 
E)  cations and anions are attracted to one another.

Question 12

Which of the structures contains a double bond?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 13

How many bonds is chlorine most likely to form?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 14

How does estradiol stimulate the growth of breast cancer cells?

Accepted Answer

A)  Estradiol is a toxin and all toxins stimulate the growth and spread of cancer. 
B)  Estradiol is a damaged estrogen that stimulates the growth of damaged cell. 
C)  Estradiol binds to breast cancer cell receptors as well as receptors found in other parts of the body. 
D)  Once a woman reaches adulthood, estradiol has no purpose in the body and so it causes breast cancer. 
E)  All of the above statements are true. 
A)  Estradiol is a toxin and all toxins stimulate the growth and spread of cancer. 
B)  Estradiol is a damaged estrogen that stimulates the growth of damaged cell. 
C)  Estradiol binds to breast cancer cell receptors as well as receptors found in other parts of the body. 
D)  Once a woman reaches adulthood, estradiol has no purpose in the body and so it causes breast cancer. 
E)  All of the above statements are true.

Question 15

Methylamine has a molecular formula of CH5N and an odor of rotten fish. Which of the following structures is the correct Lewis dot structure for methylamine?

Accepted Answer

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

Question 16

Which of these molecules exhibits dipole-dipole forces but cannot hydrogen bond with like molecules?

Accepted Answer

A)  B only 
B)  A, B, and C 
C)  B, C, and E 
D)  A, B, C, and E 
E)  D only 
A)  B only 
B)  A, B, and C 
C)  B, C, and E 
D)  A, B, C, and E 
E)  D only

Question 17

Which of the following elements might have an expanded octet in a covalent molecule?

Accepted Answer

A)  No elements have an expanded octet. 
B)  Atoms in period 2 might have an expanded octet. 
C)  Atoms in period 3 might have an expanded octet. 
D)  Any of the atoms in group two might have an expanded octet. 
E)  Any of the atoms in group three might have an expanded octet. 
A)  No elements have an expanded octet. 
B)  Atoms in period 2 might have an expanded octet. 
C)  Atoms in period 3 might have an expanded octet. 
D)  Any of the atoms in group two might have an expanded octet. 
E)  Any of the atoms in group three might have an expanded octet.

Question 18

Why does the lattice of Li2O below show more ions than the formula unit?

Accepted Answer

A)  The formula unit is a ratio of cations and anions, not the absolute number of ions. 
B)  There is an error in the formula unit. 
C)  The formula unit is just a way to balance charge; it doesn't mean anything physically. 
D)  The formula was written before the true structure was determined. 
E)  The lattice and the formula are unrelated. 
A)  The formula unit is a ratio of cations and anions, not the absolute number of ions. 
B)  There is an error in the formula unit. 
C)  The formula unit is just a way to balance charge; it doesn't mean anything physically. 
D)  The formula was written before the true structure was determined. 
E)  The lattice and the formula are unrelated.

Question 19

Which of the following is the formula for an ionic compound called calcium(II) chloride?

Accepted Answer

A)  C(II)Cl 
B)  Ca(II)Cl 
C)  Ca2Cl 
D)  C2Cl 
E)  CaCl2 
A)  C(II)Cl 
B)  Ca(II)Cl 
C)  Ca2Cl 
D)  C2Cl 
E)  CaCl2

Question 20

Which of the bonds in the following molecule are polar covalent?

Accepted Answer

A)  C-H only 
B)  C-N only 
C)  C=O only 
D)  C-N and C=O 
E)  C-N, C=O, and N-H 
A)  C-H only 
B)  C-N only 
C)  C=O only 
D)  C-N and C=O 
E)  C-N, C=O, and N-H

How many electron groups are found on the carbon and the nitrogen methylamine (CH₅N)?

An atom in a molecule has two lone pairs and two atoms bonded to it. What is the molecular shape of this atom?

Which of the molecules below exhibits hydrogen-bonding forces between like molecules?

Does formaldehyde have a permanent dipole?

What is the name of CS₂, an industrial solvent?

What is meant by the following symbols?

What is the meaning of the symbol below? [PO₄]³^-

How many lone pairs are on the carbon in dichloromethane (CH₂Cl₂)?

Which of the molecules exhibits the strongest intermolecular forces of attraction?

In this model of ethane, the dark grey balls represent _ and the white balls represent _.

In a covalent molecule,

Which of the structures contains a double bond?

How many bonds is chlorine most likely to form?

How does estradiol stimulate the growth of breast cancer cells?

Methylamine has a molecular formula of CH₅N and an odor of rotten fish. Which of the following structures is the correct Lewis dot structure for methylamine?

Which of these molecules exhibits dipole-dipole forces but cannot hydrogen bond with like molecules?

Which of the following elements might have an expanded octet in a covalent molecule?

Why does the lattice of Li₂O below show more ions than the formula unit?

Which of the following is the formula for an ionic compound called calcium(II) chloride?

Which of the bonds in the following molecule are polar covalent?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 3: Compounds and Molecules

How many electron groups are found on the carbon and the nitrogen methylamine (CH5N)?

An atom in a molecule has two lone pairs and two atoms bonded to it. What is the molecular shape of this atom?

Which of the molecules below exhibits hydrogen-bonding forces between like molecules?

Does formaldehyde have a permanent dipole?

What is the name of CS2, an industrial solvent?

What is meant by the following symbols?

What is the meaning of the symbol below? [PO4]3-

How many lone pairs are on the carbon in dichloromethane (CH2Cl2)?

Which of the molecules exhibits the strongest intermolecular forces of attraction?

In this model of ethane, the dark grey balls represent _______ and the white balls represent _______.

In a covalent molecule,

Which of the structures contains a double bond?

How many bonds is chlorine most likely to form?

How does estradiol stimulate the growth of breast cancer cells?

Methylamine has a molecular formula of CH5N and an odor of rotten fish. Which of the following structures is the correct Lewis dot structure for methylamine?

Which of these molecules exhibits dipole-dipole forces but cannot hydrogen bond with like molecules?

Which of the following elements might have an expanded octet in a covalent molecule?

Why does the lattice of Li2O below show more ions than the formula unit?

Which of the following is the formula for an ionic compound called calcium(II) chloride?

Which of the bonds in the following molecule are polar covalent?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

How many electron groups are found on the carbon and the nitrogen methylamine (CH₅N)?

What is the name of CS₂, an industrial solvent?

What is the meaning of the symbol below? [PO₄]³^-

How many lone pairs are on the carbon in dichloromethane (CH₂Cl₂)?

In this model of ethane, the dark grey balls represent _ and the white balls represent _.

Methylamine has a molecular formula of CH₅N and an odor of rotten fish. Which of the following structures is the correct Lewis dot structure for methylamine?

Why does the lattice of Li₂O below show more ions than the formula unit?