Question 1

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

Accepted Answer

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

Question 2

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 3

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 B

Question 4

What is the oxidation number of oxygen in Na2O?

Accepted Answer

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

Question 5

Determine the oxidation state of nitrogen in NO3⁻.

Accepted Answer

A) +1 
B) +6 
C) +2 
D) +3 
E) +5 
A) +1 
B) +6 
C) +2 
D) +3 
E) +5

Question 6

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 7

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 8

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 9

Which of the following statements is TRUE?

Accepted Answer

A) Ammonium nitrate is insoluble in water. 
B) Sodium nitrite is used in the glass industry. 
C) NO2 reacts with water to form ammonia. 
D) Hydrazine is a good reducing agent. 
E) Nitric acid is a weak acid. 
A) Ammonium nitrate is insoluble in water. 
B) Sodium nitrite is used in the glass industry. 
C) NO2 reacts with water to form ammonia. 
D) Hydrazine is a good reducing agent. 
E) Nitric acid is a weak acid.

Question 10

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

Accepted Answer

Students should show the Lewis

Question 11

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

Accepted Answer

I₂(s)+ 3Cl₂(

Question 12

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 13

-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 14

-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 15

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.

Question 16

-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 17

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 18

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 19

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 20

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

Exam 23: Chemistry of the Nonmetals

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

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.

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

What is the oxidation number of oxygen in Na2O?

Determine the oxidation state of nitrogen in NO3⁻.

What is the shape of a boron trihalide?

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

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

Which of the following statements is TRUE?

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

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

Which of the following statements is TRUE?

-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 pyrosilicate ZnxSi2O7.

Which of the following statements is TRUE?

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

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

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

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.

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

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

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

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

What is the oxidation number of oxygen in Na₂O?

Determine the oxidation state of nitrogen in NO₃^⁻.

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

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

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

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

-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 pyrosilicate Zn_xSi₂O₇.

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