Question 1

Refer to the above table. Use charge balance to determine the value of x in the pyrosilicate 
ZnxSi2O7.

Accepted Answer

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

Question 2

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 3

What is the shape of a boron trihalide?

Accepted Answer

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

Question 4

Refer to the above table. Predict the silicate structure for NaAl(SiO4).

Accepted Answer

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

Question 5

Describe the major production method for obtaining oxygen.

Accepted Answer

The most cost-effective method

Question 6

Match the following.
-pyroxene

Accepted Answer

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

Question 7

Determine the oxidation state of phosphorus in P2O74⁻.

Accepted Answer

A)  +5 
B)  +4 
C)  +3 
D)  +7 
E)  +2 
A)  +5 
B)  +4 
C)  +3 
D)  +7 
E)  +2

Question 8

Refer to the above table. Use charge balance to determine the value of x in the amphibole 
Mg2(OH)2Ca5(Si4O11)x.

Accepted Answer

A)  1 
B)  4 
C)  2 
D)  5 
E)  3 
A)  1 
B)  4 
C)  2 
D)  5 
E)  3

Question 9

Draw the Lewis structure for IF4⁻ and determine the geometry of the ion.

Accepted Answer

Students should show the Lewis

Question 10

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 11

Refer to the above table. Predict the silicate structure for 
CaMg2(Si2O7).

Accepted Answer

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

Question 12

Write the balanced equation that represents the formation of hydrofluoric acid from the reaction of calcium fluoride with sulfuric acid.

Accepted Answer

A)  CaF2 + H2S → CaS + 2HF 
B)  CF4 + 2H2S → 4HF + CS2 
C)  CF4 + 2H2SO4 → 4HF + CS2 + CO2 
D)  CaF2 + H2SO4 → 2HF + CaSO4 
E)  CaF2 + H2SO3 → CaSO3 + 2HF 
A)  CaF2 + H2S → CaS + 2HF 
B)  CF4 + 2H2S → 4HF + CS2 
C)  CF4 + 2H2SO4 → 4HF + CS2 + CO2 
D)  CaF2 + H2SO4 → 2HF + CaSO4 
E)  CaF2 + H2SO3 → CaSO3 + 2HF

Question 13

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

Accepted Answer

A)  K2(AlO2)(SiO2)2 
B)  K(AlO2)(SiO2) 
C)  K(AlO2)2(SiO2)2 
D)  K(AlO2)(SiO2)2 
E)  K2(AlO2)2(SiO2)2 
A)  K2(AlO2)(SiO2)2 
B)  K(AlO2)(SiO2) 
C)  K(AlO2)2(SiO2)2 
D)  K(AlO2)(SiO2)2 
E)  K2(AlO2)2(SiO2)2

Question 14

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

Accepted Answer

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

Question 15

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 16

Which of the following statements is TRUE?

Accepted Answer

A)  Silicon atoms form π bonds as easily as carbon atoms do. 
B)  Silicates are covalent atomic solids that contain silicon and oxygen. 
C)  Silicon is the most abundant element in the Earth's crust. 
D)  Silicon is one of the strongest oxidizing agents. 
E)  Silicon is the most electronegative element. 
A)  Silicon atoms form π bonds as easily as carbon atoms do. 
B)  Silicates are covalent atomic solids that contain silicon and oxygen. 
C)  Silicon is the most abundant element in the Earth's crust. 
D)  Silicon is one of the strongest oxidizing agents. 
E)  Silicon is the most electronegative element.

Question 17

Match the following.
-amphibole

Accepted Answer

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

Question 18

Determine the number of vertices and faces in the closo-Borane B7H72-.

Accepted Answer

A)  vertices = 4, faces = 10 
B)  vertices = 7, faces = 14 
C)  vertices = 3, faces = 6 
D)  vertices = 14, faces = 24 
E)  vertices = 7, faces = 10 
A)  vertices = 4, faces = 10 
B)  vertices = 7, faces = 14 
C)  vertices = 3, faces = 6 
D)  vertices = 14, faces = 24 
E)  vertices = 7, faces = 10

Question 19

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 20

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.

Exam 23: Chemistry of the Nonmetals

Refer to the above table. Use charge balance to determine the value of x in the pyrosilicate ZnxSi2O7.

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.

What is the shape of a boron trihalide?

Refer to the above table. Predict the silicate structure for NaAl(SiO4).

Describe the major production method for obtaining oxygen.

Match the following. -pyroxene

Determine the oxidation state of phosphorus in P2O74⁻.

Refer to the above table. Use charge balance to determine the value of x in the amphibole Mg2(OH)2Ca5(Si4O11)x.

Draw the Lewis structure for IF4⁻ and determine the geometry of the ion.

Which of the following statements is TRUE?

Refer to the above table. Predict the silicate structure for CaMg2(Si2O7).

Write the balanced equation that represents the formation of hydrofluoric acid from the reaction of calcium fluoride with sulfuric acid.

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

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

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

Which of the following statements is TRUE?

Match the following. -amphibole

Determine the number of vertices and faces in the closo-Borane B7H72-.

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

Which of the following statements is TRUE?

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

Refer to the above table. Use charge balance to determine the value of x in the pyrosilicate Zn_xSi₂O₇.

Refer to the above table. Predict the silicate structure for NaAl(SiO₄).

Determine the oxidation state of phosphorus in P₂O₇⁴⁻.

Refer to the above table. Use charge balance to determine the value of x in the amphibole Mg₂(OH)₂Ca₅(Si₄O₁₁)_x.

Draw the Lewis structure for IF₄⁻ and determine the geometry of the ion.

Refer to the above table. Predict the silicate structure for CaMg₂(Si₂O₇).

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

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

Determine the number of vertices and faces in the closo-Borane B₇H₇^2-.

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