Question 1

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. A large increase in pressure will

Accepted Answer

A)  lower the freezing point. 
B)  lower the boiling point. 
C)  lower the triple point. 
D)  raise the triple point. 
E)  raise the freezing point. 
A)  lower the freezing point. 
B)  lower the boiling point. 
C)  lower the triple point. 
D)  raise the triple point. 
E)  raise the freezing point.

Question 2

The heat of combustion of bituminous coal is 2.5 *104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?

Accepted Answer

The answer of The heat of combustion of bituminous coal...

Question 3

The elements of Group 5A, the nitrogen family, form compounds with hydrogen that have the boiling points listed below. SbH3 -17°C, AsH3 -55°C, PH3 -87°C, NH3 -33°C
The first three elements illustrate a trend where the boiling point decreases as the mass decreases; however, ammonia (NH3) does not follow the trend because of

Accepted Answer

A)  ionic bonding. 
B)  hydrogen bonding. 
C)  metallic bonding. 
D)  dipole-dipole attraction. 
E)  London dispersion forces. 
A)  ionic bonding. 
B)  hydrogen bonding. 
C)  metallic bonding. 
D)  dipole-dipole attraction. 
E)  London dispersion forces.

Question 4

Choose the correct statement about the diagram below.

Accepted Answer

A)  The diagram could represent the phase diagram of CO2. 
B)  The diagram shows the triple point above 1 atm pressure. 
C)  The diagram is qualitatively correct for water. 
D)  The diagram shows that the melting point of the solid increases with increasing pressure. 
E)  None of these statements is correct. 
A)  The diagram could represent the phase diagram of CO2. 
B)  The diagram shows the triple point above 1 atm pressure. 
C)  The diagram is qualitatively correct for water. 
D)  The diagram shows that the melting point of the solid increases with increasing pressure. 
E)  None of these statements is correct.

Question 5

Which of the following statements is true about p-type silicon?

Accepted Answer

A)  Electrons are the mobile charge carriers. 
B)  It is produced by doping Si with P or As. 
C)  It does not conduct electricity as well as pure Si. 
D)  All are true. 
E)  None is true. 
A)  Electrons are the mobile charge carriers. 
B)  It is produced by doping Si with P or As. 
C)  It does not conduct electricity as well as pure Si. 
D)  All are true. 
E)  None is true.

Question 6

In which of the following processes is energy evolved as heat?

Accepted Answer

A)  vaporization 
B)  crystallization 
C)  melting 
D)  sublimation 
E)  none of these 
A)  vaporization 
B)  crystallization 
C)  melting 
D)  sublimation 
E)  none of these

Question 7

Metallic copper crystallizes in a face-centered cubic lattice. The volume of the unit cell is 4.11 F1F1F1S1F1F1F10 108 pm3. What is the density of copper metal?

Accepted Answer

A)  5.14 g/cm3 
B)  373 g/cm3 
C)  10.3 g/cm3 
D)  2.57 g/cm3 
E)  62.0 g/cm3 
A)  5.14 g/cm3 
B)  373 g/cm3 
C)  10.3 g/cm3 
D)  2.57 g/cm3 
E)  62.0 g/cm3

Question 8

You are given the following boiling-point data: water, H2O
100° C
Methanol, CH3OH
64)96° C
Ethanol, CH3CH2OH
78)5° C
Diethyl ether, CH3OH2-O-CH2CH3
34)5° C
Ethylene glycol, HO-CH2-CH2-OH
198° C
Which one of these liquids would you expect to have the highest vapor pressure at room temperature?

Accepted Answer

A)  diethyl ether, CH3OH2-O-CH2CH3 
B)  ethanol, CH3CH2OH 
C)  ethylene glycol, HO-CH2-CH2-OH 
D)  methanol, CH3OH 
E)  water, H2O 
A)  diethyl ether, CH3OH2-O-CH2CH3 
B)  ethanol, CH3CH2OH 
C)  ethylene glycol, HO-CH2-CH2-OH 
D)  methanol, CH3OH 
E)  water, H2O

Question 9

Given the graph below, what is the boiling point of carbon tetrachloride at standard pressure?

Accepted Answer

A)  The graph does not give this information. 
B)  98°C 
C)  77°C 
D)  60°C 
E)  34°C 
A)  The graph does not give this information. 
B)  98°C 
C)  77°C 
D)  60°C 
E)  34°C

Question 10

Which one of the following statements about solid Cu (face-centered cubic unit cell) is incorrect?

Accepted Answer

A)  There are two atoms per unit cell. 
B)  The solid has a cubic closest-packed structure. 
C)  It will conduct electricity. 
D)  The number of atoms surrounding each Cu atom is 12. 
E)  The length of a face diagonal is four times the Cu radius. 
A)  There are two atoms per unit cell. 
B)  The solid has a cubic closest-packed structure. 
C)  It will conduct electricity. 
D)  The number of atoms surrounding each Cu atom is 12. 
E)  The length of a face diagonal is four times the Cu radius.

Question 11

Shown below is a phase diagram for compound X. How will the melting point of X change with increased pressure?

Accepted Answer

A)  There is not enough information given. 
B)  It will increase. 
C)  It will increase and then decrease. 
D)  It will decrease. 
E)  It will remain the same. 
A)  There is not enough information given. 
B)  It will increase. 
C)  It will increase and then decrease. 
D)  It will decrease. 
E)  It will remain the same.

Question 12

MnO has either a structure like NaCl or a structure like CsCl. The edge length of the MnO unit cell is 4.47 *10-8 cm, and the density of MnO is 5.28 g/cm3.
A) Does MnO crystallize like NaCl or like CsCl?
B) If the ionic radius of oxygen is 140. pm, estimate the ionic radius of manganese.
C) Does the calculated ratio of the cation radius to the anion radius for MnO support your answer in part A? Explain.

Accepted Answer

A) NaCl
B) 83.5 or 84 pm
C) r<

Question 13

What is the vapor pressure of water at 100.0°C?

Accepted Answer

A)  85 torr 
B)  175 torr 
C)  760 torr 
D)  1 torr 
E)  More information is needed. 
A)  85 torr 
B)  175 torr 
C)  760 torr 
D)  1 torr 
E)  More information is needed.

Question 14

How many grams of ice would be melted by the energy obtained as 18.0 g of steam is condensed at 100°C and cooled to 0°C?

Accepted Answer

The answer of How many grams of ice would be...

Question 15

A certain compound with a molar mass of 138.0 g/mol crystallizes with the sodium chloride (rock salt) structure. The length of an edge of the unit cell is 488 pm. What is the density of this compound?

Accepted Answer

A)  1.97 g/cm3 
B)  1.88 g/cm3 
C)  4.75 g/cm3 
D)  7.89 g/cm3 
E)  1.19 g/cm3 
A)  1.97 g/cm3 
B)  1.88 g/cm3 
C)  4.75 g/cm3 
D)  7.89 g/cm3 
E)  1.19 g/cm3

Question 16

Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at P = 1.0 atm and T = 100 by subliming it. In order to sublime the sample, you should

Accepted Answer

A)  increase T to 300 K, keeping P = 1.0 atm. 
B)  abandon the attempt to sublime X. 
C)  lower P to 0.5 atm and then increase T to 200 K. 
D)  increase P to 1.5 atm and then increase T to 300 K. 
E)  increase T to 300 K and then lower P to 0.5 atm. 
A)  increase T to 300 K, keeping P = 1.0 atm. 
B)  abandon the attempt to sublime X. 
C)  lower P to 0.5 atm and then increase T to 200 K. 
D)  increase P to 1.5 atm and then increase T to 300 K. 
E)  increase T to 300 K and then lower P to 0.5 atm.

Question 17

A p-type semiconductor

Accepted Answer

A)  is made by doping host atoms with atoms having more valence electrons than the host. 
B)  has electrons that lie close in energy to the conduction bands. 
C)  is made by doping host atoms with atoms having fewer valence electrons than the host. 
D)  two of these 
E)  none of these 
A)  is made by doping host atoms with atoms having more valence electrons than the host. 
B)  has electrons that lie close in energy to the conduction bands. 
C)  is made by doping host atoms with atoms having fewer valence electrons than the host. 
D)  two of these 
E)  none of these

Question 18

Below is a phase diagram for compound X. What is the normal boiling point of X is most likely to be?

Accepted Answer

A)  0° C 
B)  73° C 
C)  15° C 
D)  47° C 
E)  18° C 
A)  0° C 
B)  73° C 
C)  15° C 
D)  47° C 
E)  18° C

Question 19

Which of the following is the smallest hole in a closest-packed lattice of spheres?

Accepted Answer

A)  trigonal 
B)  cubic 
C)  tetrahedral 
D)  octahedral 
E)  none of these 
A)  trigonal 
B)  cubic 
C)  tetrahedral 
D)  octahedral 
E)  none of these

Question 20

Which is generally larger, the heat of fusion or the heat of vaporization for a given substance? Explain your answer.

Accepted Answer

The heat of vaporiza

The density of the solid phase of a substance is 0.90 g/cm³ and the density of the liquid phase is 1.0 g/cm³. A large increase in pressure will

The heat of combustion of bituminous coal is 2.5 *10⁴ J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?

Choose the correct statement about the diagram below.

Which of the following statements is true about p-type silicon?

In which of the following processes is energy evolved as heat?

Metallic copper crystallizes in a face-centered cubic lattice. The volume of the unit cell is 4.11  10⁸ pm³. What is the density of copper metal?

Given the graph below, what is the boiling point of carbon tetrachloride at standard pressure?

Which one of the following statements about solid Cu (face-centered cubic unit cell) is incorrect?

Shown below is a phase diagram for compound X. How will the melting point of X change with increased pressure?

What is the vapor pressure of water at 100.0°C?

How many grams of ice would be melted by the energy obtained as 18.0 g of steam is condensed at 100°C and cooled to 0°C?

A certain compound with a molar mass of 138.0 g/mol crystallizes with the sodium chloride (rock salt) structure. The length of an edge of the unit cell is 488 pm. What is the density of this compound?

Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at P = 1.0 atm and T = 100 by subliming it. In order to sublime the sample, you should

A p-type semiconductor

Below is a phase diagram for compound X. What is the normal boiling point of X is most likely to be?

Which of the following is the smallest hole in a closest-packed lattice of spheres?

Which is generally larger, the heat of fusion or the heat of vaporization for a given substance? Explain your answer.

Atoms, Molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Quantum Mechanics and Atomic Theory

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

The Nucleus: a Chemists View

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Exam 16: Liquids and Solids

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. A large increase in pressure will

The heat of combustion of bituminous coal is 2.5 *104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?

Choose the correct statement about the diagram below.

Which of the following statements is true about p-type silicon?

In which of the following processes is energy evolved as heat?

Metallic copper crystallizes in a face-centered cubic lattice. The volume of the unit cell is 4.11  108 pm3. What is the density of copper metal?

You are given the following boiling-point data: water, H2O 100° C Methanol, CH3OH 64)96° C Ethanol, CH3CH2OH 78)5° C Diethyl ether, CH3OH2-O-CH2CH3 34)5° C Ethylene glycol, HO-CH2-CH2-OH 198° C Which one of these liquids would you expect to have the highest vapor pressure at room temperature?

Given the graph below, what is the boiling point of carbon tetrachloride at standard pressure?

Which one of the following statements about solid Cu (face-centered cubic unit cell) is incorrect?

Shown below is a phase diagram for compound X. How will the melting point of X change with increased pressure?

What is the vapor pressure of water at 100.0°C?

How many grams of ice would be melted by the energy obtained as 18.0 g of steam is condensed at 100°C and cooled to 0°C?

A certain compound with a molar mass of 138.0 g/mol crystallizes with the sodium chloride (rock salt) structure. The length of an edge of the unit cell is 488 pm. What is the density of this compound?

Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at P = 1.0 atm and T = 100 by subliming it. In order to sublime the sample, you should

A p-type semiconductor

Below is a phase diagram for compound X. What is the normal boiling point of X is most likely to be?

Which of the following is the smallest hole in a closest-packed lattice of spheres?

Which is generally larger, the heat of fusion or the heat of vaporization for a given substance? Explain your answer.

Atoms, Molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Quantum Mechanics and Atomic Theory

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

The density of the solid phase of a substance is 0.90 g/cm³ and the density of the liquid phase is 1.0 g/cm³. A large increase in pressure will

The heat of combustion of bituminous coal is 2.5 *10⁴ J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?

Metallic copper crystallizes in a face-centered cubic lattice. The volume of the unit cell is 4.11  10⁸ pm³. What is the density of copper metal?