Question 1

Determine the oxidation state of sulfur in S2O72-.

Accepted Answer

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

Question 2

Which of the following statements is TRUE?

Accepted Answer

A)  Sheets of graphitic carbon bond strongly to one another. 
B)  The graphite form of carbon is more dense than diamond. 
C)  Carbon atoms sometimes cluster together into substances called fullerenes. 
D)  The diamond form of carbon conducts electricity. 
E)  Graphite is the hardest known material. 
A)  Sheets of graphitic carbon bond strongly to one another. 
B)  The graphite form of carbon is more dense than diamond. 
C)  Carbon atoms sometimes cluster together into substances called fullerenes. 
D)  The diamond form of carbon conducts electricity. 
E)  Graphite is the hardest known material. C

Question 3

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

Accepted Answer

A)  Mg(AlO2)2(SiO2)2 
B)  Mg2(AlO2)2(SiO2)2 
C)  Mg2(AlO2)2(SiO2) 
D)  Mg2(AlO2)(SiO2)2 
E)  Mg(AlO2)(SiO2)2 
A)  Mg(AlO2)2(SiO2)2 
B)  Mg2(AlO2)2(SiO2)2 
C)  Mg2(AlO2)2(SiO2) 
D)  Mg2(AlO2)(SiO2)2 
E)  Mg(AlO2)(SiO2)2 A

Question 4

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 5

Determine the number of vertices and faces in the closo-Borane B12H122-.

Accepted Answer

A)  vertices = 12, faces = 24 
B)  vertices = 12, faces = 20 
C)  vertices = 8, faces = 16 
D)  vertices = 6, faces = 8 
E)  vertices = 8, faces = 12 
A)  vertices = 12, faces = 24 
B)  vertices = 12, faces = 20 
C)  vertices = 8, faces = 16 
D)  vertices = 6, faces = 8 
E)  vertices = 8, faces = 12

Question 6

Write the balanced reaction that shows the formation of ICl3 from its elements.

Accepted Answer

I₂(s) + 3Cl

Question 7

Determine the oxidation state of carbon in the carbonate ion CO32-.

Accepted Answer

A)  +2 
B)  +4 
C)  +3 
D)  +6 
E)  +8 
A)  +2 
B)  +4 
C)  +3 
D)  +6 
E)  +8

Question 8

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 9

Identify the formula of the compound that is in common glass.

Accepted Answer

A)  SiO2 
B)  Si2O3 
C)  SiO3 
D)  Si2O2 
E)  SiO4 
A)  SiO2 
B)  Si2O3 
C)  SiO3 
D)  Si2O2 
E)  SiO4

Question 10

What is the oxidation number of oxygen in CsO2?

Accepted Answer

A)  -1/24 
B)  +1/2 
C)  -2 
D)  +2 
E)  -1 
A)  -1/24 
B)  +1/2 
C)  -2 
D)  +2 
E)  -1

Question 11

Match the following.
-pyrosilicate

Accepted Answer

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

Question 12

Which of the following statements is TRUE?

Accepted Answer

A)  Ionic carbides form between carbon and another highly electronegative element. 
B)  Carbides are soft materials with low melting points. 
C)  Metallic carbides are more malleable than the pure metal. 
D)  Covalent carbides are formed between carbon and a nonmetal with low electronegativity. 
E)  Carbides can be cationic, anionic, and covalent. 
A)  Ionic carbides form between carbon and another highly electronegative element. 
B)  Carbides are soft materials with low melting points. 
C)  Metallic carbides are more malleable than the pure metal. 
D)  Covalent carbides are formed between carbon and a nonmetal with low electronegativity. 
E)  Carbides can be cationic, anionic, and covalent.

Question 13

What is the major drawback to using bituminous coal as an energy source?

Accepted Answer

A)  It has very low carbon content. 
B)  It contains a high amount of sulfur, which when burned contributes to acid rain. 
C)  It has an extremely high surface area, which makes it difficult to burn. 
D)  Bituminous coal is noncrystalline, which gives it a low energy/gram ratio. 
E)  Bituminous coal is very expensive to produce and transport. 
A)  It has very low carbon content. 
B)  It contains a high amount of sulfur, which when burned contributes to acid rain. 
C)  It has an extremely high surface area, which makes it difficult to burn. 
D)  Bituminous coal is noncrystalline, which gives it a low energy/gram ratio. 
E)  Bituminous coal is very expensive to produce and transport.

Question 14

Match the following.
-phyllosilicate

Accepted Answer

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

Question 15

Determine the oxidation state of nitrogen in NaN3.

Accepted Answer

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

Question 16

Refer to the above table. Predict the silicate structure for 
KAl(SiO3)2.

Accepted Answer

A)  phyllosilicate 
B)  orthosilicate 
C)  amphibole 
D)  pyroxene 
E)  pyrosilicate 
A)  phyllosilicate 
B)  orthosilicate 
C)  amphibole 
D)  pyroxene 
E)  pyrosilicate

Question 17

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 18

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 19

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

Question 20

Determine the number of vertices and faces in the closo-Borane B10H102-.

Accepted Answer

A)  vertices = 10, faces = 16 
B)  vertices = 5, faces = 6 
C)  vertices = 5, faces = 10 
D)  vertices = 10, faces = 20 
E)  vertices = 20, faces = 36 
A)  vertices = 10, faces = 16 
B)  vertices = 5, faces = 6 
C)  vertices = 5, faces = 10 
D)  vertices = 10, faces = 20 
E)  vertices = 20, faces = 36

Exam 23: Chemistry of the Nonmetals

Determine the oxidation state of sulfur in S2O72-.

Which of the following statements is TRUE?

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

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

Determine the number of vertices and faces in the closo-Borane B12H122-.

Write the balanced reaction that shows the formation of ICl3 from its elements.

Determine the oxidation state of carbon in the carbonate ion CO32-.

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

Identify the formula of the compound that is in common glass.

What is the oxidation number of oxygen in CsO2?

Match the following. -pyrosilicate

Which of the following statements is TRUE?

What is the major drawback to using bituminous coal as an energy source?

Match the following. -phyllosilicate

Determine the oxidation state of nitrogen in NaN3.

Refer to the above table. Predict the silicate structure for KAl(SiO3)2.

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?

What is the oxidation number of oxygen in H2O2?

Determine the number of vertices and faces in the closo-Borane B10H102-.

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 Metallurgy

Transition Metals and Coordination Compounds

Filters

Determine the oxidation state of sulfur in S₂O₇²^-.

Determine the number of vertices and faces in the closo-Borane B₁₂H₁₂^2-.

Write the balanced reaction that shows the formation of ICl₃ from its elements.

Determine the oxidation state of carbon in the carbonate ion CO₃^2-.

What is the oxidation number of oxygen in CsO₂?

Determine the oxidation state of nitrogen in NaN₃.

Refer to the above table. Predict the silicate structure for KAl(SiO₃)₂.

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

What is the oxidation number of oxygen in H₂O₂?

Determine the number of vertices and faces in the closo-Borane B₁₀H₁₀^2-.