Question 1

What statement about the ammonia molecule, NH3, is FALSE?

Accepted Answer

A) The molecule contains three polar bonds. 
B) The molecule itself is not polar. 
C) The molecule has a trigonal pyramidal shape. 
D) The nitrogen atom has one nonbonding pair of electrons. 
E) The pull of the electrons in the N?H bonds is toward the nitrogen atom. 
A) The molecule contains three polar bonds. 
B) The molecule itself is not polar. 
C) The molecule has a trigonal pyramidal shape. 
D) The nitrogen atom has one nonbonding pair of electrons. 
E) The pull of the electrons in the N?H bonds is toward the nitrogen atom.

Question 2

What is the name of the ion NH4+?

Accepted Answer

A) nitrogen tetrahydrate 
B) nitrogen hydrate 
C) mononitrogen tetrahydrogen 
D) ninhydrin 
E) ammonium 
A) nitrogen tetrahydrate 
B) nitrogen hydrate 
C) mononitrogen tetrahydrogen 
D) ninhydrin 
E) ammonium

Question 3

How many bonding electrons are in CO2?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 8 
A) 1 
B) 2 
C) 3 
D) 4 
E) 8

Question 4

Which statement about compounds is FALSE?

Accepted Answer

A) Compounds consist of atoms of two or more different elements that are chemically bonded together. 
B) The elements in a compound cannot be separated or recovered by a physical process. 
C) Ionic compounds are composed of cations and anions. 
D) Covalent compounds are composed of metals and nonmetals. 
E) Intermolecular forces are attractive forces between molecules of a compound, and are responsible for the compound?s physical properties. 
A) Compounds consist of atoms of two or more different elements that are chemically bonded together. 
B) The elements in a compound cannot be separated or recovered by a physical process. 
C) Ionic compounds are composed of cations and anions. 
D) Covalent compounds are composed of metals and nonmetals. 
E) Intermolecular forces are attractive forces between molecules of a compound, and are responsible for the compound?s physical properties.

Question 5

Vehicle airbags inflate when the ionic compound sodium azide rapidly decomposes to the elements sodium and nitrogen.If the azide ion is a polyatomic ion with the formula N3−, what is the formula of sodium azide?

Accepted Answer

A) NaN3 
B) Na3N3 
C) Na3(N3)3 
D) Na3N 
E) Na(N3)3 
A) NaN3 
B) Na3N3 
C) Na3(N3)3 
D) Na3N 
E) Na(N3)3

Question 6

Which of the following Lewis structures represent resonance forms of ozone, O3?

Accepted Answer

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

Question 7

Draw the Lewis structures of F2, O2 and N2.Which statement is true?

Accepted Answer

A) All three molecules have a single bond between the atoms. 
B) Both O2 and N2 have double bonds connecting the atoms. 
C) Fluorine has the shortest bond between the two atoms. 
D) The bond between the nitrogen atoms in N2 is stronger than the bond in F2 and O2. 
E) All three molecules have triple bonds between the atoms. 
A) All three molecules have a single bond between the atoms. 
B) Both O2 and N2 have double bonds connecting the atoms. 
C) Fluorine has the shortest bond between the two atoms. 
D) The bond between the nitrogen atoms in N2 is stronger than the bond in F2 and O2. 
E) All three molecules have triple bonds between the atoms.

Question 8

In the molecule AX2, the central atom A has two lone pairs of electrons in addition to the two bond pairs in the A-X bonds.What is the shape of this molecule?

Accepted Answer

A) bent, bond angle close to 109.5o 
B) bent, bond angle close to 120o 
C) linear 
D) trigonal planar 
E) trigonal pyramidal 
A) bent, bond angle close to 109.5o 
B) bent, bond angle close to 120o 
C) linear 
D) trigonal planar 
E) trigonal pyramidal

Question 9

Because the C-H bond in methane is polar, the CH4 molecule will also be polar.

Accepted Answer

A) True 
 B)False

Question 10

A molecule of deoxyribose, an essential part of DNA, contains five carbon atoms, ten hydrogen atoms, and four oxygen atoms.How would the formula of deoxyribose be represented?

Accepted Answer

A) 5C10H4O 
B) C5H10O4 
C) C5H10O4 
D) C5H10O4 
E) All formulas are acceptable. 
A) 5C10H4O 
B) C5H10O4 
C) C5H10O4 
D) C5H10O4 
E) All formulas are acceptable.

Question 11

Which compound contains a central atom with an exception to the octet rule known as an expanded octet?

Accepted Answer

A) BeH2 
B) NO 
C) PF5 
D) CH4 
E) BF3 
A) BeH2 
B) NO 
C) PF5 
D) CH4 
E) BF3

What statement about the ammonia molecule, NH₃, is FALSE?

What is the name of the ion NH₄+_?

How many bonding electrons are in CO₂?

Which statement about compounds is FALSE?

Vehicle airbags inflate when the ionic compound sodium azide rapidly decomposes to the elements sodium and nitrogen.If the azide ion is a polyatomic ion with the formula N₃−_, what is the formula of sodium azide?

Which of the following Lewis structures represent resonance forms of ozone, O₃?

Draw the Lewis structures of F₂, O₂ and N₂.Which statement is true?

In the molecule AX₂, the central atom A has two lone pairs of electrons in addition to the two bond pairs in the A-X bonds.What is the shape of this molecule?

Because the C-H bond in methane is polar, the CH₄ molecule will also be polar.

A molecule of deoxyribose, an essential part of DNA, contains five carbon atoms, ten hydrogen atoms, and four oxygen atoms.How would the formula of deoxyribose be represented?

Which compound contains a central atom with an exception to the octet rule known as an expanded octet?

Chemistry:methods and Measurement

The Structure of the Atom and the Periodic Table

Calculations, Chemical Changes, and the Chemical Equation

States of Matter- Gases, Liquids, and Solids

Solutions

Energy, Rate and Equilibrium

Acids and Bases

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

Exam 3: Structure and Properties of Ionic and Covalent Compounds

What statement about the ammonia molecule, NH3, is FALSE?

What is the name of the ion NH4+?

How many bonding electrons are in CO2?

Which statement about compounds is FALSE?

Vehicle airbags inflate when the ionic compound sodium azide rapidly decomposes to the elements sodium and nitrogen.If the azide ion is a polyatomic ion with the formula N3−, what is the formula of sodium azide?

Which of the following Lewis structures represent resonance forms of ozone, O3?

Draw the Lewis structures of F2, O2 and N2.Which statement is true?

In the molecule AX2, the central atom A has two lone pairs of electrons in addition to the two bond pairs in the A-X bonds.What is the shape of this molecule?

Because the C-H bond in methane is polar, the CH4 molecule will also be polar.

A molecule of deoxyribose, an essential part of DNA, contains five carbon atoms, ten hydrogen atoms, and four oxygen atoms.How would the formula of deoxyribose be represented?

Which compound contains a central atom with an exception to the octet rule known as an expanded octet?

Chemistry:methods and Measurement

The Structure of the Atom and the Periodic Table

Calculations, Chemical Changes, and the Chemical Equation

States of Matter- Gases, Liquids, and Solids

Solutions

Energy, Rate and Equilibrium

Acids and Bases

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

What statement about the ammonia molecule, NH₃, is FALSE?

What is the name of the ion NH₄+_?

How many bonding electrons are in CO₂?

Vehicle airbags inflate when the ionic compound sodium azide rapidly decomposes to the elements sodium and nitrogen.If the azide ion is a polyatomic ion with the formula N₃−_, what is the formula of sodium azide?

Which of the following Lewis structures represent resonance forms of ozone, O₃?

Draw the Lewis structures of F₂, O₂ and N₂.Which statement is true?

In the molecule AX₂, the central atom A has two lone pairs of electrons in addition to the two bond pairs in the A-X bonds.What is the shape of this molecule?

Because the C-H bond in methane is polar, the CH₄ molecule will also be polar.