Question 1

Determine the oxidation state of nitrogen in NaN3.

Accepted Answer

A) +1 
B) +3 
C) -1 
D) -   
E) -3 
A) +1 
B) +3 
C) -1 
D) -   
E) -3

Question 2

Which of the following is TRUE?

Accepted Answer

A) Phosphoric acid is used to produce the "fizziness" in soda. 
B) Sodium phosphate is an additive in baked goods to give them a longer shelf life. 
C) Phosphorus can range in oxidation state from -3 to +5. 
D) The phosphorus in the phosphite ion has an oxidation state of -3. 
E) Phosphoric acid is a very strong oxidizing agent, just like nitric acid. 
A) Phosphoric acid is used to produce the "fizziness" in soda. 
B) Sodium phosphate is an additive in baked goods to give them a longer shelf life. 
C) Phosphorus can range in oxidation state from -3 to +5. 
D) The phosphorus in the phosphite ion has an oxidation state of -3. 
E) Phosphoric acid is a very strong oxidizing agent, just like nitric acid.

Question 3

Match the following.

-phyllosilicate

Accepted Answer

A) Si2O52- 
B) SiO44- 
C) Si4O116- 
D) SiO32- 
E) Si2O76- 
A) Si2O52- 
B) SiO44- 
C) Si4O116- 
D) SiO32- 
E) Si2O76-

Question 4

Which of the following statements is TRUE?

Accepted Answer

A) Boron oxide, when added to silicon oxide glass, forms a more heat stable glass called Pyrex. 
B) Boron most commonly forms compounds that fulfill the octet rule. 
C) Boron forms fairly weak bonds with oxygen because of their large electronegativity difference. 
D) Boron trichloride is an example of a strong Lewis base. 
E) Boron is a typical gaseous nonmetallic element. 
A) Boron oxide, when added to silicon oxide glass, forms a more heat stable glass called Pyrex. 
B) Boron most commonly forms compounds that fulfill the octet rule. 
C) Boron forms fairly weak bonds with oxygen because of their large electronegativity difference. 
D) Boron trichloride is an example of a strong Lewis base. 
E) Boron is a typical gaseous nonmetallic element.

Question 5

Identify an example of a nitrite.

Accepted Answer

A) NaNO2 
B) NO 
C) N2O 
D) NaNO3 
E) NO2 
A) NaNO2 
B) NO 
C) N2O 
D) NaNO3 
E) NO2

Question 6

Determine the oxidation state of chlorine in ClO⁻.

Accepted Answer

A) 0 
B) +1 
C) -2 
D) -1 
E) +2 
A) 0 
B) +1 
C) -2 
D) -1 
E) +2

Question 7

Which of the following are major components of Earth's crust?

Accepted Answer

A) oxygen and silicon 
B) calcium and silicon 
C) oxygen and iron 
D) oxygen, hydrogen, and carbon 
E) oxygen, iron, and carbon 
A) oxygen and silicon 
B) calcium and silicon 
C) oxygen and iron 
D) oxygen, hydrogen, and carbon 
E) oxygen, iron, and carbon

Question 8

Describe the major production method for obtaining oxygen.

Accepted Answer

The most cost-effective method

Question 9

Match the following.

-pyroxene

Accepted Answer

A) Si2O52- 
B) SiO44- 
C) Si4O116- 
D) SiO32- 
E) Si2O76- 
A) Si2O52- 
B) SiO44- 
C) Si4O116- 
D) SiO32- 
E) Si2O76-

Question 10

Why are the chemical properties of nitrogen and phosphorus so different when they are in the same family?

Accepted Answer

Phosphorus is much larger and

Question 11

Determine the formula for an aluminosilicate where one-quarter of the silicons are replaced by an aluminum atom. The charge is balanced by sodium ions.

Accepted Answer

A) Na2(AlO2)2(SiO2) 
B) Na2(AlO2)2(SiO2)3 
C) Na(AlO2)2(SiO2) 
D) Na2(AlO2)2(SiO2)2 
E) Na(AlO2)(SiO2)3 
A) Na2(AlO2)2(SiO2) 
B) Na2(AlO2)2(SiO2)3 
C) Na(AlO2)2(SiO2) 
D) Na2(AlO2)2(SiO2)2 
E) Na(AlO2)(SiO2)3

Question 12

-Refer to the above table. Use charge balance to determine the value of x in the phyllosilicate Ca3(Si2O5)2(OH)x.

Accepted Answer

A) 6 
B) 4 
C) 3 
D) 1 
E) 2 
A) 6 
B) 4 
C) 3 
D) 1 
E) 2

Question 13

Determine the oxidation state of carbon in the ionic carbide CaC2.

Accepted Answer

A) -2 
B) +4 
C) -1 
D) +1 
E) -4 
A) -2 
B) +4 
C) -1 
D) +1 
E) -4

Question 14

-Refer to the above table. Use charge balance to determine the value of x in the orthosilicate CaxSiO4.

Accepted Answer

A) 3 
B) 1 
C) 2 
D) 4 
E) 6 
A) 3 
B) 1 
C) 2 
D) 4 
E) 6

Question 15

Tetraphosphorus decoxide reacts with water to produce phosphoric acid. Write a balanced reaction for this process.

Accepted Answer

A) P4O10 + 6H2O → 4H3PO4 
B) P2O5 + 3H2O → 2H3PO3 
C) P4 + 3O2 + 6H2O → 4H3PO4 
D) P4O10 + 4H2O → 4H2PO3 
E) P4 + 3O2 + 6H2O → 4H3PO3 
A) P4O10 + 6H2O → 4H3PO4 
B) P2O5 + 3H2O → 2H3PO3 
C) P4 + 3O2 + 6H2O → 4H3PO4 
D) P4O10 + 4H2O → 4H2PO3 
E) P4 + 3O2 + 6H2O → 4H3PO3

Question 16

-Refer to the above table. Use charge balance to determine the value of x in the pyroxene Cax(SiO3)2.

Accepted Answer

A) 2 
B) 1 
C) 4 
D) 6 
E) 3 
A) 2 
B) 1 
C) 4 
D) 6 
E) 3

Question 17

Which of the following statements is TRUE?

Accepted Answer

A) Boron is a large component of Earth's crust. 
B) Boron is usually found in its elemental state in the Earth's crust. 
C) Due to boron's small size and low electronegativity, it behaves as a semimetal instead of a metal. 
D) Boron atoms don't typically bond to one another due to its small atomic radius. 
E) There are at least five allotropes of elemental boron. 
A) Boron is a large component of Earth's crust. 
B) Boron is usually found in its elemental state in the Earth's crust. 
C) Due to boron's small size and low electronegativity, it behaves as a semimetal instead of a metal. 
D) Boron atoms don't typically bond to one another due to its small atomic radius. 
E) There are at least five allotropes of elemental boron.

Question 18

Determine the oxidation state of sulfur in S2O32-.

Accepted Answer

A) +3 
B) +6 
C) +2 
D) +4 
E) 0 
A) +3 
B) +6 
C) +2 
D) +4 
E) 0

Question 19

Which of the following statements is TRUE?

Accepted Answer

A) All silicates are composed of SiO4 tetrahedra that bond together through an oxygen to form single chains. 
B) The fibrous nature of asbestos comes from its silicate network structure. 
C) In some silicates, ionic bonding between a metal ion and an SixOyz- ion is what holds the structure together. 
D) The flakiness of mica comes from its single silicate chain structure. 
E) Silicates are easily soluble in water because they contain silicate anions in their structure. 
A) All silicates are composed of SiO4 tetrahedra that bond together through an oxygen to form single chains. 
B) The fibrous nature of asbestos comes from its silicate network structure. 
C) In some silicates, ionic bonding between a metal ion and an SixOyz- ion is what holds the structure together. 
D) The flakiness of mica comes from its single silicate chain structure. 
E) Silicates are easily soluble in water because they contain silicate anions in their structure.

Question 20

What is the oxidation number of oxygen in H2O2?

Accepted Answer

A) -4 
B) +2 
C) -2 
D) -1 
E) +1 
A) -4 
B) +2 
C) -2 
D) -1 
E) +1

Exam 23: Chemistry of the Nonmetals

Determine the oxidation state of nitrogen in NaN3.

Which of the following is TRUE?

Match the following. -phyllosilicate

Which of the following statements is TRUE?

Identify an example of a nitrite.

Determine the oxidation state of chlorine in ClO⁻.

Which of the following are major components of Earth's crust?

Describe the major production method for obtaining oxygen.

Match the following. -pyroxene

Why are the chemical properties of nitrogen and phosphorus so different when they are in the same family?

Determine the formula for an aluminosilicate where one-quarter of the silicons are replaced by an aluminum atom. The charge is balanced by sodium ions.

-Refer to the above table. Use charge balance to determine the value of x in the phyllosilicate Ca3(Si2O5)2(OH)x.

Determine the oxidation state of carbon in the ionic carbide CaC2.

-Refer to the above table. Use charge balance to determine the value of x in the orthosilicate CaxSiO4.

Tetraphosphorus decoxide reacts with water to produce phosphoric acid. Write a balanced reaction for this process.

-Refer to the above table. Use charge balance to determine the value of x in the pyroxene Cax(SiO3)2.

Which of the following statements is TRUE?

Determine the oxidation state of sulfur in S2O32-.

Which of the following statements is TRUE?

What is the oxidation number of oxygen in H2O2?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

Determine the oxidation state of nitrogen in NaN₃.

-Refer to the above table. Use charge balance to determine the value of x in the phyllosilicate Ca₃(Si₂O₅)₂(OH)_x.

Determine the oxidation state of carbon in the ionic carbide CaC₂.

-Refer to the above table. Use charge balance to determine the value of x in the orthosilicate Ca_xSiO₄.

-Refer to the above table. Use charge balance to determine the value of x in the pyroxene Ca_x(SiO₃)₂.

Determine the oxidation state of sulfur in S₂O₃^2-.

What is the oxidation number of oxygen in H₂O₂?