Question 1

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 2

-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 3

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 4

Determine the oxidation state of nitrogen in NaN3.

Accepted Answer

A) +1 
B) +3 
C) -1 
D) -$\frac{1}{3}$ 
E) -3 
A) +1 
B) +3 
C) -1 
D) -$\frac{1}{3}$ 
E) -3

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

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

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

What is the oxidation number of oxygen in H₂O₂?

Determine the oxidation state of nitrogen in NaN₃.

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

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

Exam 23: Chemistry of the Nonmetals

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

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

What is the oxidation number of oxygen in H2O2?

Determine the oxidation state of nitrogen in NaN3.

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

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.Predict the silicate structure for KAl(SiO₃)₂.

What is the oxidation number of oxygen in H₂O₂?

Determine the oxidation state of nitrogen in NaN₃.

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