Question 1

Which of the following refers to an alloy in which the composition of the elements is constant?

Accepted Answer

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

Question 2

The sheet structure of carbon is ________

Accepted Answer

A) diamond. 
B) graphite. 
C) fullerene. 
D) industrial diamond. 
E) rolled carbon steel. 
A) diamond. 
B) graphite. 
C) fullerene. 
D) industrial diamond. 
E) rolled carbon steel.

Question 3

Which of the following refers to an alloy in which the composition of the elements is variable and one element must have a much smaller radius than the other?

Accepted Answer

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

Question 4

Which statement regarding the formation of an alloy is correct?

Accepted Answer

A) Carbon forms an interstitial alloy with iron because their atomic radii are about the same. 
B) Carbon forms a substitutional alloy with iron because their atomic radii are about the same. 
C) Carbon forms an interstitial alloy with iron because carbon has a much smaller atomic radius. 
D) Carbon forms a substitutional alloy with iron because carbon has a much smaller atomic radius. 
E) Carbon forms an interstitial alloy with iron because carbon has a much larger atomic radius. 
A) Carbon forms an interstitial alloy with iron because their atomic radii are about the same. 
B) Carbon forms a substitutional alloy with iron because their atomic radii are about the same. 
C) Carbon forms an interstitial alloy with iron because carbon has a much smaller atomic radius. 
D) Carbon forms a substitutional alloy with iron because carbon has a much smaller atomic radius. 
E) Carbon forms an interstitial alloy with iron because carbon has a much larger atomic radius.

Question 5

Nickel (Ni) crystallizes as a face-centered unit cell with an edge length of 382 pm. What is the atomic radius of nickel?

Accepted Answer

A) 135 pm 
B) 165 pm 
C) 191 pm 
D) 252 pm 
E) 1,080 pm 
A) 135 pm 
B) 165 pm 
C) 191 pm 
D) 252 pm 
E) 1,080 pm

Question 6

In fluorite, ________

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 7

Iron (Fe) has a density of 7.874 g/cm3 and crystallizes in a body-centered cubic structure. What is the atomic radius of iron?

Accepted Answer

A) 99 pm 
B) 114 pm 
C) 124 pm 
D) 143 pm 
E) 255 pm 
A) 99 pm 
B) 114 pm 
C) 124 pm 
D) 143 pm 
E) 255 pm

Question 8

In the cubic closest-packed structure of sodium chloride, which ions are touching or nearly touching?
I.sodium ions and sodium ions
II.chloride ions and chloride ions
III.sodium ions and chloride ions

Accepted Answer

A) I only 
B) II only 
C) III only 
D) II and III only 
E) I and III only 
A) I only 
B) II only 
C) III only 
D) II and III only 
E) I and III only

Question 9

Which of these is not a condensation polymer?

Accepted Answer

A) Spandex 
B) Nylon 
C) PETE 
D) poly(propylene) 
E) polyester 
A) Spandex 
B) Nylon 
C) PETE 
D) poly(propylene) 
E) polyester

Question 10

Which unit cell contains the most atoms?

Accepted Answer

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

Question 11

The hybridization of atomic orbitals in graphite is ________

Accepted Answer

A) none, since it is the element. 
B) sp. 
C) sp2. 
D) sp3. 
E) dsp3. 
A) none, since it is the element. 
B) sp. 
C) sp2. 
D) sp3. 
E) dsp3.

Question 12

Which of the following contribute to the arrangement of ions in the unit cells of an ionic solid?
I.the empirical formula
II.the relative radii of the ions
III.the shape of polyatomic ions

Accepted Answer

A) I and II only 
B) II and III only 
C) I and III only 
D) I only 
E) I, II, and III 
A) I and II only 
B) II and III only 
C) I and III only 
D) I only 
E) I, II, and III

Question 13

Silver crystallizes with a face-centered cubic unit cell. The edge length is 407.7 pm. What is the volume of this unit cell?

Accepted Answer

A) 7.68 F1F1F1S1F1F1F10 107 pm3 
B) 6.78 F1F1F1S1F1F1F10 107 pm3 
C) 8.67 F1F1F1S1F1F1F10 107 pm3 
D) 9.87 F1F1F1S1F1F1F10 107 pm3 
E) 3.88 F1F1F1S1F1F1F10 107 pm3 
A) 7.68 F1F1F1S1F1F1F10 107 pm3 
B) 6.78 F1F1F1S1F1F1F10 107 pm3 
C) 8.67 F1F1F1S1F1F1F10 107 pm3 
D) 9.87 F1F1F1S1F1F1F10 107 pm3 
E) 3.88 F1F1F1S1F1F1F10 107 pm3

Question 14

Platinum (Pt) has a face-centered cubic structure with an edge length of 135 pm. What is the calculated value of the density of platinum based on this information?

Accepted Answer

The answer of Platinum (Pt) has a face-centered cubic structure...

Question 15

Briefly explain why the density of LDPE (low-density polyethylene) is less than that of HDPE (high-density polyethylene).

Accepted Answer

HDPE is a linear polymer while

Question 16

Write the chemical reaction using skeleton structures for the polymerization of adipic acid (HOOC(CH2)4COOH) and 1,6-diaminohexane (H2N(CH2)6NH2), and note the general name for this type of reaction.

Accepted Answer

@#IMG-DLM& Condensat

Question 17

Would you expect the linear allotrope of carbon to conduct electricity? (Fragments of it were first prepared and characterized in 1998.)

Accepted Answer

A) No, the linear carbon chains would have no free electrons for carrying electricity. 
B) Yes, this allotrope would be ionic and would therefore conduct electricity. 
C) No, linear carbon chains would easily break under any electrical potential difference. 
D) Yes, electrons can move through the delocalized F1F1F1S1F1F1F10 network. 
E) No, only metals conduct electricity. 
A) No, the linear carbon chains would have no free electrons for carrying electricity. 
B) Yes, this allotrope would be ionic and would therefore conduct electricity. 
C) No, linear carbon chains would easily break under any electrical potential difference. 
D) Yes, electrons can move through the delocalized F1F1F1S1F1F1F10 network. 
E) No, only metals conduct electricity.

Question 18

Aluminum (Al) has a density of 2.70 g/cm3 and crystallizes in a face-centered cubic structure. What is the unit cell edge length in picometers?

Accepted Answer

Question 19

Gold has a face-centered cubic structure with a unit cell edge length of 407.8 pm. What is the contribution to the density from each individual gold atom in g/cm3?

Accepted Answer

Question 20

The monomer for polystyrene is shown below. Which of the bonds is involved in the polymerization process?

Accepted Answer

A) I only 
B) II only 
C) III only 
D) IV only 
E) Bonds I-IV are all involved in polymerization. 
A) I only 
B) II only 
C) III only 
D) IV only 
E) Bonds I-IV are all involved in polymerization.

Exam 12: Solids: Crystals, Alloys, and Polymers

Which of the following refers to an alloy in which the composition of the elements is constant?

The sheet structure of carbon is ________

Which of the following refers to an alloy in which the composition of the elements is variable and one element must have a much smaller radius than the other?

Which statement regarding the formation of an alloy is correct?

Nickel (Ni) crystallizes as a face-centered unit cell with an edge length of 382 pm. What is the atomic radius of nickel?

In fluorite, ________

Iron (Fe) has a density of 7.874 g/cm3 and crystallizes in a body-centered cubic structure. What is the atomic radius of iron?

In the cubic closest-packed structure of sodium chloride, which ions are touching or nearly touching? I.sodium ions and sodium ions II.chloride ions and chloride ions III.sodium ions and chloride ions

Which of these is not a condensation polymer?

Which unit cell contains the most atoms?

The hybridization of atomic orbitals in graphite is ________

Which of the following contribute to the arrangement of ions in the unit cells of an ionic solid? I.the empirical formula II.the relative radii of the ions III.the shape of polyatomic ions

Silver crystallizes with a face-centered cubic unit cell. The edge length is 407.7 pm. What is the volume of this unit cell?

Platinum (Pt) has a face-centered cubic structure with an edge length of 135 pm. What is the calculated value of the density of platinum based on this information?

Briefly explain why the density of LDPE (low-density polyethylene) is less than that of HDPE (high-density polyethylene).

Write the chemical reaction using skeleton structures for the polymerization of adipic acid (HOOC(CH2)4COOH) and 1,6-diaminohexane (H2N(CH2)6NH2), and note the general name for this type of reaction.

Would you expect the linear allotrope of carbon to conduct electricity? (Fragments of it were first prepared and characterized in 1998.)

Aluminum (Al) has a density of 2.70 g/cm3 and crystallizes in a face-centered cubic structure. What is the unit cell edge length in picometers?

Gold has a face-centered cubic structure with a unit cell edge length of 407.8 pm. What is the contribution to the density from each individual gold atom in g/cm3?

The monomer for polystyrene is shown below. Which of the bonds is involved in the polymerization process?

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

Iron (Fe) has a density of 7.874 g/cm³ and crystallizes in a body-centered cubic structure. What is the atomic radius of iron?

Write the chemical reaction using skeleton structures for the polymerization of adipic acid (HOOC(CH₂)₄COOH) and 1,6-diaminohexane (H₂N(CH₂)₆NH₂), and note the general name for this type of reaction.

Aluminum (Al) has a density of 2.70 g/cm³ and crystallizes in a face-centered cubic structure. What is the unit cell edge length in picometers?

Gold has a face-centered cubic structure with a unit cell edge length of 407.8 pm. What is the contribution to the density from each individual gold atom in g/cm³?