Question 1

In addition to carbon and iron, stainless steel contains ________

Accepted Answer

A) Teflon and polyethylene. 
B) gold and silver. 
C) copper and nickel. 
D) chromium and nickel. 
E) platinum. 
A) Teflon and polyethylene. 
B) gold and silver. 
C) copper and nickel. 
D) chromium and nickel. 
E) platinum.

Question 2

Which unit cell contains the least atoms?

Accepted Answer

A) fcc 
B) bcc 
C) sc 
D) both fcc and bcc 
E) None of the above, as fcc, bcc, and sc contain the same number of atoms. 
A) fcc 
B) bcc 
C) sc 
D) both fcc and bcc 
E) None of the above, as fcc, bcc, and sc contain the same number of atoms.

Question 3

Stainless steel is less susceptible to rusting than iron because ________

Accepted Answer

A) it is coated with plastic. 
B) the metals other than iron in the alloy form protective oxides. 
C) the carbon within the alloy polymerizes to form a protective film. 
D) the silicon within the alloy oxidizes to form a protective silicate layer. 
E) the intermetallic compound formed is less reactive. 
A) it is coated with plastic. 
B) the metals other than iron in the alloy form protective oxides. 
C) the carbon within the alloy polymerizes to form a protective film. 
D) the silicon within the alloy oxidizes to form a protective silicate layer. 
E) the intermetallic compound formed is less reactive.

Question 4

Which of the following refers to an alloy in which the composition is variable and the elements have comparable radii?

Accepted Answer

A) intermetallic 
B) interstitial 
C) stoichiometric 
D) substitutional 
E) homogeneous 
A) intermetallic 
B) interstitial 
C) stoichiometric 
D) substitutional 
E) homogeneous

Question 5

What type of packing best describes the layering patterns shown below?
a)   b)   c)

Accepted Answer

a) cubic-closest packed/face-c

Question 6

If a salt has a face-centered cubic (fcc) unit cell and a 1:2 cation:anion stoichiometry with cations occupying the fcc positions, then the anions fill all the ________ holes.

Accepted Answer

A) Cubic 
B) octahedral 
C) tetrahedral 
D) octahedral and tetrahedral 
E) cubic, octahedral, and tetrahedral 
A) Cubic 
B) octahedral 
C) tetrahedral 
D) octahedral and tetrahedral 
E) cubic, octahedral, and tetrahedral

Question 7

Bronze that is composed of 10% tin and 90% copper is ________

Accepted Answer

A) a substitutional alloy. 
B) an interstitial alloy. 
C) a doped semiconductor. 
D) a colloidal alloy. 
E) an intermetallic compound. 
A) a substitutional alloy. 
B) an interstitial alloy. 
C) a doped semiconductor. 
D) a colloidal alloy. 
E) an intermetallic compound.

Question 8

The cubic unit cell of rhenium trioxide (ReO3) has Re atoms at the corners and O atoms on each of the 12 edges. The atoms touch along the edges. The radii are Re 137 pm and O 73 pm. What is the density of ReO3?

Accepted Answer

A) 2.55 g/cm3 
B) 2.94 g/cm3 
C) 3.49 g/cm3 
D) 5.25 g/cm3 
E) 7.52 g/cm3 
A) 2.55 g/cm3 
B) 2.94 g/cm3 
C) 3.49 g/cm3 
D) 5.25 g/cm3 
E) 7.52 g/cm3

Question 9

Iron crystallizes in a body-centered cubic pattern. How many iron atoms are in each unit cell?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 8 
E) 9 
A) 1 
B) 2 
C) 4 
D) 8 
E) 9

Question 10

If a body-centered cubic unit cell has a volume of 1.447 F1F1F1S1F1F1F10 108 pm3, what must be the dimension of the cube's edge?

Accepted Answer

A) 1.131 F1F1F1S1F1F1F10 108 pm 
B) 110 pm 
C) 1.20 F1F1F1S1F1F1F10 104 pm 
D) 525 pm 
E) 367 pm 
A) 1.131 F1F1F1S1F1F1F10 108 pm 
B) 110 pm 
C) 1.20 F1F1F1S1F1F1F10 104 pm 
D) 525 pm 
E) 367 pm

Question 11

In antifluorite structures, ________

Accepted Answer

A) cations are smaller than the anions, and there are two cations for every anion. 
B) anions are smaller than the cations, and there are two anions for every cation. 
C) cations are smaller than the anions, and there are two anions for every cation. 
D) anions are smaller than the cations, and there are two cations for every anion. 
E) anions and cations are the same size. 
A) cations are smaller than the anions, and there are two cations for every anion. 
B) anions are smaller than the cations, and there are two anions for every cation. 
C) cations are smaller than the anions, and there are two anions for every cation. 
D) anions are smaller than the cations, and there are two cations for every anion. 
E) anions and cations are the same size.

Question 12

The basic building block of a polymer is called ________

Accepted Answer

A) a functional group. 
B) a monomer. 
C) a monotone. 
D) an oligomer. 
E) an addition. 
A) a functional group. 
B) a monomer. 
C) a monotone. 
D) an oligomer. 
E) an addition.

Question 13

If a face-centered cubic unit cell has a volume of 1.447 F1F1F1S1F1F1F10 108 pm3 and the ions at the corners touch the ion on the face, what must be the ion's radius in picometers?

Accepted Answer

Question 14

Which of the following tends to be true of polymers but not small molecules?
I.variable instead of constant composition
II.a poorly defined melting point
III.solid state regions that are disordered

Accepted Answer

A) I 
B) II 
C) III 
D) I, II, and III 
E) None of these, as polymers are molecules just like small molecules, only bigger. 
A) I 
B) II 
C) III 
D) I, II, and III 
E) None of these, as polymers are molecules just like small molecules, only bigger.

Question 15

The higher the carbon content in steel, ________

Accepted Answer

A) the stronger and more malleable it is. 
B) the stronger and more brittle it is. 
C) the weaker and more malleable it is. 
D) the weaker and more brittle it is. 
E) Any of these, depending on the formula of the interstitial compound. 
A) the stronger and more malleable it is. 
B) the stronger and more brittle it is. 
C) the weaker and more malleable it is. 
D) the weaker and more brittle it is. 
E) Any of these, depending on the formula of the interstitial compound.

Question 16

An octahedral hole in a crystal lattice is defined as ________

Accepted Answer

A) twice the size of a tetrahedral hole. 
B) the space between any number of atoms having octahedral edges. 
C) the space between a cluster of six adjacent atoms arranged in a octahedron. 
D) the space between layers of sp2 hybridized atoms, such as in graphite. 
E) a large hole having six sides arranged in an octahedral shape. 
A) twice the size of a tetrahedral hole. 
B) the space between any number of atoms having octahedral edges. 
C) the space between a cluster of six adjacent atoms arranged in a octahedron. 
D) the space between layers of sp2 hybridized atoms, such as in graphite. 
E) a large hole having six sides arranged in an octahedral shape.

Question 17

Why does a pure metal not crystallize in a fluorite or antifluorite unit cell?

Accepted Answer

A) They can and do. 
B) These unit cells require two types of atoms or ions with differing radii. 
C) Pure metals do not crystallize; they are amorphous. 
D) The atoms in pure metals move about in a sea of electrons. 
E) The radius of the metal is too large. 
A) They can and do. 
B) These unit cells require two types of atoms or ions with differing radii. 
C) Pure metals do not crystallize; they are amorphous. 
D) The atoms in pure metals move about in a sea of electrons. 
E) The radius of the metal is too large.

Question 18

Aluminum is resistant to corrosion because of ________

Accepted Answer

A) its positive oxidation potential. 
B) its low density. 
C) the formation of a protective surface film of aluminum oxide. 
D) the formation of a protective surface film of aluminum nitride. 
E) its lack of reactivity toward oxygen. 
A) its positive oxidation potential. 
B) its low density. 
C) the formation of a protective surface film of aluminum oxide. 
D) the formation of a protective surface film of aluminum nitride. 
E) its lack of reactivity toward oxygen.

Question 19

Hexamethylenediamine and adipic acid, a dicarboxylic acid, undergo ________

Accepted Answer

A) condensation polymerization. 
B) addition polymerization. 
C) subtraction polymerization. 
D) chiral polymerization. 
E) a combination of addition and condensation polymerization. 
A) condensation polymerization. 
B) addition polymerization. 
C) subtraction polymerization. 
D) chiral polymerization. 
E) a combination of addition and condensation polymerization.

Question 20

If half of the tetrahedral holes in a face-centered cubic unit cell are filled, what must be the stoichiometry of the ionic compound, written as nonhole sites:hole sites in lowest terms?

Accepted Answer

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

Exam 12: Solids: Crystals, Alloys, and Polymers

In addition to carbon and iron, stainless steel contains ________

Which unit cell contains the least atoms?

Stainless steel is less susceptible to rusting than iron because ________

Which of the following refers to an alloy in which the composition is variable and the elements have comparable radii?

What type of packing best describes the layering patterns shown below? a) b) c)

If a salt has a face-centered cubic (fcc) unit cell and a 1:2 cation:anion stoichiometry with cations occupying the fcc positions, then the anions fill all the ________ holes.

Bronze that is composed of 10% tin and 90% copper is ________

The cubic unit cell of rhenium trioxide (ReO3) has Re atoms at the corners and O atoms on each of the 12 edges. The atoms touch along the edges. The radii are Re 137 pm and O 73 pm. What is the density of ReO3?

Iron crystallizes in a body-centered cubic pattern. How many iron atoms are in each unit cell?

If a body-centered cubic unit cell has a volume of 1.447  108 pm3, what must be the dimension of the cube's edge?

In antifluorite structures, ________

The basic building block of a polymer is called ________

If a face-centered cubic unit cell has a volume of 1.447  108 pm3 and the ions at the corners touch the ion on the face, what must be the ion's radius in picometers?

Which of the following tends to be true of polymers but not small molecules? I.variable instead of constant composition II.a poorly defined melting point III.solid state regions that are disordered

The higher the carbon content in steel, ________

An octahedral hole in a crystal lattice is defined as ________

Why does a pure metal not crystallize in a fluorite or antifluorite unit cell?

Aluminum is resistant to corrosion because of ________

Hexamethylenediamine and adipic acid, a dicarboxylic acid, undergo ________

If half of the tetrahedral holes in a face-centered cubic unit cell are filled, what must be the stoichiometry of the ionic compound, written as nonhole sites:hole sites in lowest terms?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

The cubic unit cell of rhenium trioxide (ReO₃) has Re atoms at the corners and O atoms on each of the 12 edges. The atoms touch along the edges. The radii are Re 137 pm and O 73 pm. What is the density of ReO₃?

If a body-centered cubic unit cell has a volume of 1.447  10⁸ pm³, what must be the dimension of the cube's edge?

If a face-centered cubic unit cell has a volume of 1.447  10⁸ pm³ and the ions at the corners touch the ion on the face, what must be the ion's radius in picometers?