Question 1

-If figure (1)represents the vapor pressure of water,at 25°C,which figure represents the vapor pressure of mercury at 25°C?

Accepted Answer

A) figure (2) 
B) figure (3) 
C) figure (4) 
A) figure (2) 
B) figure (3) 
C) figure (4)

Question 2

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 139 pm?

Accepted Answer

A) 197 pm 
B) 393 pm 
C) 556 pm 
D) 1110 pm 
A) 197 pm 
B) 393 pm 
C) 556 pm 
D) 1110 pm

Question 3

The vapor pressure of a pure liquid increases as the

Accepted Answer

A) average kinetic energy of the molecules in the liquid phase decreases. 
B) intermolecular attractive forces increase. 
C) temperature of the liquid phase decreases. 
D) temperature of the liquid phase increases. 
A) average kinetic energy of the molecules in the liquid phase decreases. 
B) intermolecular attractive forces increase. 
C) temperature of the liquid phase decreases. 
D) temperature of the liquid phase increases.

Question 4

A certain mineral,MS1U1B1xS1U1B0M'S1U1B1yS1U1B0AS1U1B1zS1U1B0,crystallizes in the cubic unit cell shown below.M and M' represent cations and A represents the anions.  
-If cation M has a 2+ charge and anion A has a 2- charge,what is the oxidation state of cation M'?

Accepted Answer

A) +1 
B) +2 
C) +3 
D) +4 
A) +1 
B) +2 
C) +3 
D) +4

Question 5

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 6

What is the physical phase of the substance at T = 100 K and P = 0.1 atm?

Accepted Answer

A) gas 
B) liquid 
C) solid 
D) supercritical fluid 
A) gas 
B) liquid 
C) solid 
D) supercritical fluid

Question 7

The layers of graphite are held together by

Accepted Answer

A) covalent bonds. 
B) ion-ion forces. 
C) London dispersion forces. 
D) cationic forces. 
A) covalent bonds. 
B) ion-ion forces. 
C) London dispersion forces. 
D) cationic forces.

Question 8

From the phase diagram above,the minimum pressure at which this substance can exist in the liquid phase is

Accepted Answer

A) 0.25 atm. 
B) 0.45 atm. 
C) 1.0 atm. 
D) 1.2 atm. 
A) 0.25 atm. 
B) 0.45 atm. 
C) 1.0 atm. 
D) 1.2 atm.

Question 9

Diamond is held together by

Accepted Answer

A) covalent bonds. 
B) ion-dipole forces. 
C) van der Waals forces. 
D) ionic forces. 
A) covalent bonds. 
B) ion-dipole forces. 
C) van der Waals forces. 
D) ionic forces.

Question 10

Which of the following forms a molecular solid?

Accepted Answer

A) CaCl2   
B) C9H8O4 
C) C, graphite 
D) palladium 
A) CaCl2   
B) C9H8O4 
C) C, graphite 
D) palladium

Question 11

Which of the following statements is not consistent with the properties of a molecular solid?

Accepted Answer

A) a compound that conducts electricity when molten 
B) a low melting solid 
C) a solid formed by the combination of two nonmetallic elements 
D) a solid that is a nonconductor of electricity 
A) a compound that conducts electricity when molten 
B) a low melting solid 
C) a solid formed by the combination of two nonmetallic elements 
D) a solid that is a nonconductor of electricity

Question 12

The solids formed by Na,Na2O2,SiO2,and N2 are classified as ________,________,________,and ________,respectively.

Accepted Answer

metallic,i

Question 13

A low-melting crystalline compound that does not conduct electricity in the solid or liquid state is classified as a ________ solid.

Accepted Answer

The answer of A low-melting crystalline compound that does not...

Question 14

Which of the following substances has the highest boiling point?

Accepted Answer

A) CH3-CH2-CH2-CH2-CH3   
B) Ar 
C) CH3-CH2-CH2-CH3 
D) (CH3)2CHCH2CH3 
A) CH3-CH2-CH2-CH2-CH3   
B) Ar 
C) CH3-CH2-CH2-CH3 
D) (CH3)2CHCH2CH3

Question 15

An element forms a body-centered cubic crystalline substance.The edge length of the unit cell is 287 pm and the density of the crystal is 7.92 g/cm3.Calculate the atomic weight of the substance.

Accepted Answer

A) 45.0 amu 
B) 48.0 amu 
C) 56.4 amu 
D) 63.5 amu 
A) 45.0 amu 
B) 48.0 amu 
C) 56.4 amu 
D) 63.5 amu

Question 16

Which of the following phase changes has a positive value for its entropy change?

Accepted Answer

A) creating steam 
B) formation of snow from a cloud 
C) sublimation of gaseous CO2 
D) making ice cubes from liquid water 
A) creating steam 
B) formation of snow from a cloud 
C) sublimation of gaseous CO2 
D) making ice cubes from liquid water

Question 17

Molecules of a liquid can pass into the vapor phase only if the

Accepted Answer

A) liquid has little surface tension. 
B) molecules have sufficient kinetic energy to overcome the intermolecular forces in the liquid. 
C) temperature of the liquid is near its boiling point. 
D) vapor pressure of the liquid is high. 
A) liquid has little surface tension. 
B) molecules have sufficient kinetic energy to overcome the intermolecular forces in the liquid. 
C) temperature of the liquid is near its boiling point. 
D) vapor pressure of the liquid is high.

Question 18

A certain mineral crystallizes in the cubic unit cell shown below.  
-How many cations and how many anions are in the unit cell?

Accepted Answer

A) 4 cations and 4 anions 
B) 4 cations and 8 anions 
C) 4 cations and 14 anions 
D) 8 cations and 4 anions 
A) 4 cations and 4 anions 
B) 4 cations and 8 anions 
C) 4 cations and 14 anions 
D) 8 cations and 4 anions

Question 19

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 diethyl ether?

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 20

Arrange the following in order of increasing boiling point. CH3CH2OH CH3CH2CH2CH3 H3C-O-CH2CH3 CH3CH2NH2
I II III IV

Accepted Answer

A) IV < III < II < I 
B) II < III < IV < I 
C) I < IV < III < II 
D) II < III < I < IV 
A) IV < III < II < I 
B) II < III < IV < I 
C) I < IV < III < II 
D) II < III < I < IV

Exam 11: Liquids, solids, and Phase Changes

-If figure (1)represents the vapor pressure of water,at 25°C,which figure represents the vapor pressure of mercury at 25°C?

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 139 pm?

The vapor pressure of a pure liquid increases as the

A certain mineral,MxM'yAz,crystallizes in the cubic unit cell shown below.M and M' represent cations and A represents the anions. -If cation M has a 2+ charge and anion A has a 2- charge,what is the oxidation state of cation M'?

Identify the packing in the figure shown below.

What is the physical phase of the substance at T = 100 K and P = 0.1 atm?

The layers of graphite are held together by

From the phase diagram above,the minimum pressure at which this substance can exist in the liquid phase is

Diamond is held together by

Which of the following forms a molecular solid?

Which of the following statements is not consistent with the properties of a molecular solid?

The solids formed by Na,Na2O2,SiO2,and N2 are classified as ________,________,________,and ________,respectively.

A low-melting crystalline compound that does not conduct electricity in the solid or liquid state is classified as a ________ solid.

Which of the following substances has the highest boiling point?

An element forms a body-centered cubic crystalline substance.The edge length of the unit cell is 287 pm and the density of the crystal is 7.92 g/cm3.Calculate the atomic weight of the substance.

Which of the following phase changes has a positive value for its entropy change?

Molecules of a liquid can pass into the vapor phase only if the

A certain mineral crystallizes in the cubic unit cell shown below. -How many cations and how many anions are in the unit cell?

Arrange the following in order of increasing boiling point. CH3CH2OH CH3CH2CH2CH3 H3C-O-CH2CH3 CH3CH2NH2 I II III IV

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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. -If cation M has a 2+ charge and anion A has a 2- charge,what is the oxidation state of cation M'?

The solids formed by Na,Na₂O₂,SiO₂,and N₂ are classified as ,,,and ,respectively.

An element forms a body-centered cubic crystalline substance.The edge length of the unit cell is 287 pm and the density of the crystal is 7.92 g/cm³.Calculate the atomic weight of the substance.

Arrange the following in order of increasing boiling point. CH₃CH₂OH CH₃CH₂CH₂CH₃ H₃C-O-CH₂CH₃ CH₃CH₂NH₂ I II III IV