Question 1

Layers of atoms having a spacing of 105 pm will diffract X-rays with d = 154.2 pm at an angle of ________ degrees.

Accepted Answer

The answer of Layers of atoms having a spacing of...

Question 2

KBr crystallizes in a cubic unit cell with Br- ions on each corner and each face.How many K+ ions and Br- ions are in each unit cell of KBr?

Accepted Answer

A) 1 K+ ion and 1 Br- ion 
B) 2 K+ ions and 2 Br- ions 
C) 4 K+ ions and 4 Br- ions 
D) 8 K+ ions and 8 Br- ions 
A) 1 K+ ion and 1 Br- ion 
B) 2 K+ ions and 2 Br- ions 
C) 4 K+ ions and 4 Br- ions 
D) 8 K+ ions and 8 Br- ions

Question 3

As a liquid evaporates at a temperature below its boiling point,the temperature of the liquid

Accepted Answer

A) decreases. 
B) decreases at low temperatures,but increases at high temperatures. 
C) increases. 
D) remains unchanged. 
A) decreases. 
B) decreases at low temperatures,but increases at high temperatures. 
C) increases. 
D) remains unchanged.

Question 4

A certain metal can exist in two different cubic cells,body-centered and face-centered cubic.Which unit cell will have the greater density?

Accepted Answer

The answer of A certain metal can exist in two...

Question 5

When cubic unit cells stack together,how many unit cells share a common corner?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
A) 2 
B) 4 
C) 6 
D) 8

Question 6

The property of a liquid that is a measure of the liquid's resistance to increase its surface area is ________.

Accepted Answer

The answer of The property of a liquid that is...

Question 7

Which type of bonding does Ca form upon solidification?

Accepted Answer

A) covalent network 
B) ionic 
C) metallic 
D) molecular 
A) covalent network 
B) ionic 
C) metallic 
D) molecular

Question 8

The cubic unit cell in which the radius of an atom is 31/2 d/4,where d is the unit cell edge length,is the ________ unit cell.

Accepted Answer

Question 9

A certain mineral,MS1U1B1xS1U1B0M'S1U1B1yS1U1B0AS1U1B1zS1U1B0,crystallizes in the cubic unit cell shown below.M and M' represent cations and A represents the anions.  
-What is the empirical formula of the mineral?

Accepted Answer

A) MM'A 
B) MM'A3 
C) M2M'A3 
D) M8M'A6 
A) MM'A 
B) MM'A3 
C) M2M'A3 
D) M8M'A6

Question 10

________ are used as a battery electrode material.

Accepted Answer

A) Buckyballs 
B) Graphite 
C) Carbon 
D) Sucrose molecules 
A) Buckyballs 
B) Graphite 
C) Carbon 
D) Sucrose molecules

Question 11

The normal boiling point occurs when the

Accepted Answer

A) intermolecular forces within the liquid phase are broken. 
B) temperature of the pure liquid equals the external temperature. 
C) vapor pressure of a pure liquid equals an external pressure of one atmosphere. 
D) vapor pressure of the liquid equals the external pressure. 
A) intermolecular forces within the liquid phase are broken. 
B) temperature of the pure liquid equals the external temperature. 
C) vapor pressure of a pure liquid equals an external pressure of one atmosphere. 
D) vapor pressure of the liquid equals the external pressure.

Question 12

Iridium crystallizes in a face-centered cubic structure.What is the edge length of the unit cell if the atomic radius of silver is 180 pm?

Accepted Answer

A) 441 pm 
B) 64 pm 
C) 38 pm 
D) 509 pm 
A) 441 pm 
B) 64 pm 
C) 38 pm 
D) 509 pm

Question 13

Which of the following is expected to have the greatest viscosity?

Accepted Answer

A) C5H12 
B) C6H14 
C) C5H11OH 
D) CH4 
A) C5H12 
B) C6H14 
C) C5H11OH 
D) CH4

Question 14

When a liquid is heated at its boiling point,the

Accepted Answer

A) ionic bonds are broken,allowing sublimation to occur. 
B) temperature of the liquid decreases. 
C) temperature of the liquid remains the same as long as any liquid is present. 
D) temperature of the vapor phase decreases. 
A) ionic bonds are broken,allowing sublimation to occur. 
B) temperature of the liquid decreases. 
C) temperature of the liquid remains the same as long as any liquid is present. 
D) temperature of the vapor phase decreases.

Question 15

An ionic compound crystallizes in a unit cell having a face-centered cubic array of anions,X-,and half of the tetrahedral holes filled with metal ions,Mn+ The empirical formula of this ionic compound is

Accepted Answer

A) MX. 
B) MX2. 
C) M2X. 
D) M2X7. 
A) MX. 
B) MX2. 
C) M2X. 
D) M2X7.

Question 16

The plots below represent vapor pressure vs.temperature curves for diethyl ether,ethanol,mercury,and water,not necessarily in that order.  
-Based on the relative strengths of the intermolecular forces of attraction of each substance,which is the most likely vapor pressure vs.temperature curve for mercury?

Accepted Answer

A) curve (a) 
B) curve (b) 
C) curve (c) 
D) curve (d) 
A) curve (a) 
B) curve (b) 
C) curve (c) 
D) curve (d)

Question 17

Of C2H5OH and C3H5(OH)3 the one expected to have the higher vapor pressure is ________,and the one expected to have the higher boiling point is ________.

Accepted Answer

Question 18

Which of the following best explains why ΔHvap is usually higher than ΔHfusion?

Accepted Answer

A) Vaporization occurs at high temperature. 
B) Vaporization involves the breaking of bonds within molecules. 
C) Vaporization involves the breaking of all bonds between molecules. 
D) Vaporization increases the entropy of molecules. 
A) Vaporization occurs at high temperature. 
B) Vaporization involves the breaking of bonds within molecules. 
C) Vaporization involves the breaking of all bonds between molecules. 
D) Vaporization increases the entropy of molecules.

Question 19

Identify the packing in the figure shown below.

Accepted Answer

A) body-centered cubic 
B) cubic closest packed (face-centered cubic) 
C) hexagonal closest packed 
D) simple cubic 
A) body-centered cubic 
B) cubic closest packed (face-centered cubic) 
C) hexagonal closest packed 
D) simple cubic

Question 20

What phases can be present at 200°C and 0.75 atm pressure?

Accepted Answer

A) only the vapor phase 
B) only the liquid phase 
C) only the solid phase 
D) both the solid and vapor phases 
A) only the vapor phase 
B) only the liquid phase 
C) only the solid phase 
D) both the solid and vapor phases

Exam 11: Liquids, solids, and Phase Changes

Layers of atoms having a spacing of 105 pm will diffract X-rays with d = 154.2 pm at an angle of ________ degrees.

KBr crystallizes in a cubic unit cell with Br- ions on each corner and each face.How many K+ ions and Br- ions are in each unit cell of KBr?

As a liquid evaporates at a temperature below its boiling point,the temperature of the liquid

A certain metal can exist in two different cubic cells,body-centered and face-centered cubic.Which unit cell will have the greater density?

When cubic unit cells stack together,how many unit cells share a common corner?

The property of a liquid that is a measure of the liquid's resistance to increase its surface area is ________.

Which type of bonding does Ca form upon solidification?

The cubic unit cell in which the radius of an atom is 31/2 d/4,where d is the unit cell edge length,is the ________ unit cell.

A certain mineral,MxM'yAz,crystallizes in the cubic unit cell shown below.M and M' represent cations and A represents the anions. -What is the empirical formula of the mineral?

________ are used as a battery electrode material.

The normal boiling point occurs when the

Iridium crystallizes in a face-centered cubic structure.What is the edge length of the unit cell if the atomic radius of silver is 180 pm?

Which of the following is expected to have the greatest viscosity?

When a liquid is heated at its boiling point,the

An ionic compound crystallizes in a unit cell having a face-centered cubic array of anions,X-,and half of the tetrahedral holes filled with metal ions,Mn+ The empirical formula of this ionic compound is

Of C2H5OH and C3H5(OH)3 the one expected to have the higher vapor pressure is ________,and the one expected to have the higher boiling point is ________.

Which of the following best explains why ΔHvap is usually higher than ΔHfusion?

Identify the packing in the figure shown below.

What phases can be present at 200°C and 0.75 atm pressure?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

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KBr crystallizes in a cubic unit cell with Br^- ions on each corner and each face.How many K⁺ ions and Br^- ions are in each unit cell of KBr?

The cubic unit cell in which the radius of an atom is 3^1/2d/4,where d is the unit cell edge length,is the ________ unit cell.

A certain mineral,M_xM'_yA_z,crystallizes in the cubic unit cell shown below.M and M' represent cations and A represents the anions. -What is the empirical formula of the mineral?

An ionic compound crystallizes in a unit cell having a face-centered cubic array of anions,X^-,and half of the tetrahedral holes filled with metal ions,Mⁿ⁺ The empirical formula of this ionic compound is

Of C₂H₅OH and C₃H₅(OH)₃ the one expected to have the higher vapor pressure is ,and the one expected to have the higher boiling point is .

Which of the following best explains why ΔH_vap is usually higher than ΔH_fusion?