Question 1

Which of the following statements is true for an ideal gas?

Accepted Answer

A)  A plot of ln P vsersus 1/T (in Kelvin)yields a straight line with a slope equal to −ΔHvap. 
B)  A plot of ln P versus T (in Kelvin)yields a straight line with a slope equal to ΔHvap. 
C)  A plot of ln P versus 1/T (in Kelvin)yields a straight line with a slope equal to −ΔHvap/R. 
D)  A plot of P versus 1/T (in Kelvin)yields a straight line with a slope equal to 1/−ΔHvap. 
E)  A plot of P versus T (in Kelvin)yields a straight line with a slope equal to −ΔHvap/RT. 
A)  A plot of ln P vsersus 1/T (in Kelvin)yields a straight line with a slope equal to −ΔHvap. 
B)  A plot of ln P versus T (in Kelvin)yields a straight line with a slope equal to ΔHvap. 
C)  A plot of ln P versus 1/T (in Kelvin)yields a straight line with a slope equal to −ΔHvap/R. 
D)  A plot of P versus 1/T (in Kelvin)yields a straight line with a slope equal to 1/−ΔHvap. 
E)  A plot of P versus T (in Kelvin)yields a straight line with a slope equal to −ΔHvap/RT.

Question 2

Arrange the three common unit cells in order from least dense to most dense packing.

Accepted Answer

A)  simple cubic < body-centered cubic < face-centered cubic 
B)  simple cubic < face-centered cubic < body-centered cubic 
C)  body-centered cubic < face-centered cubic < simple cubic 
D)  body-centered cubic < simple cubic < face-centered cubic 
E)  face-centered cubic < body-centered cubic < simple cubic 
A)  simple cubic < body-centered cubic < face-centered cubic 
B)  simple cubic < face-centered cubic < body-centered cubic 
C)  body-centered cubic < face-centered cubic < simple cubic 
D)  body-centered cubic < simple cubic < face-centered cubic 
E)  face-centered cubic < body-centered cubic < simple cubic

Question 3

All of the following statements concerning hydrogen bonding are correct EXCEPT

Accepted Answer

A)  water is less dense in the solid phase than the liquid phase due to hydrogen bonding. 
B)  hydrogen bonding occurs in molecules with N−H,O−H,and F−H bonds. 
C)  hydrogen bonding in water results in lower than expected melting points. 
D)  the unusually high boiling points of water,ammonia,and hydrogen fluoride are the result of hydrogen bonding. 
E)  hydrogen bonding is an unusually strong dipole force. 
A)  water is less dense in the solid phase than the liquid phase due to hydrogen bonding. 
B)  hydrogen bonding occurs in molecules with N−H,O−H,and F−H bonds. 
C)  hydrogen bonding in water results in lower than expected melting points. 
D)  the unusually high boiling points of water,ammonia,and hydrogen fluoride are the result of hydrogen bonding. 
E)  hydrogen bonding is an unusually strong dipole force.

Question 4

Arrange N2,O2,He,and Cl2 in order from lowest to highest melting point.

Accepted Answer

A)  O2 2 2 2 2 2 
C)  He 2 2 2 
D)  He 2 2 2 
E)  He 2 2 2 
A)  O2 2 2 2 2 2 
C)  He 2 2 2 
D)  He 2 2 2 
E)  He 2 2 2

Question 5

Use the phase digram to answer the following questions:  
-According to the phase diagram ,which point corresponds to conditions where both liquid and gas phases exist?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  E 
E)  F 
A)  A 
B)  B 
C)  C 
D)  E 
E)  F

Question 6

What process occurs when a substance is at point C on the phase diagram below,and the pressure is decreased (under constant temperature)until the substance is at point E?

Accepted Answer

A)  condensation 
B)  vaporization 
C)  sublimation 
D)  melting 
E)  freezing 
A)  condensation 
B)  vaporization 
C)  sublimation 
D)  melting 
E)  freezing

Question 7

Nickel has a face-centered cubic cell,and its density is 8.90 g/cm3.What is the radius (in pm)of a nickel atom? (The molar mass of nickel is 58.69 g/mol)

Accepted Answer

A)  62.3 pm 
B)  88.1 pm 
C)  125 pm 
D)  249 pm 
E)  535 pm 
A)  62.3 pm 
B)  88.1 pm 
C)  125 pm 
D)  249 pm 
E)  535 pm

Question 8

At 75.0 °C,water has an equilibrium vapor pressure of 289.1 mm Hg.If 4.22 g H2O is sealed in an evacuated 5.00 L flask and heated to 75.0 °C,what mass of H2O will be found in the gas phase when liquid-vapor equilibrium is established? Assume any liquid remaining in the flask has a negligible volume.(760 mm Hg = 1 atm,R = 0.0821 L.atm/mol.K)

Accepted Answer

A)  0.240 g 
B)  1.20 g 
C)  2.64 g 
D)  3.02 g 
E)  4.22 g 
A)  0.240 g 
B)  1.20 g 
C)  2.64 g 
D)  3.02 g 
E)  4.22 g

Question 9

How many unit cells share an atom which is located at a corner (or lattice point)of a simple cubic unit cell?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  6 
E)  8 
A)  1 
B)  2 
C)  4 
D)  6 
E)  8

Question 10

Freon-113,C2Cl3F3,has an enthalpy of vaporization of 27.04 kJ/mol and a normal boiling point of 48°C.At what temperature is the vapor pressure of Freon-113 equal to 76.0 mm Hg? (R = 8.31 J/K.mol)

Accepted Answer

A)  −53.1°C 
B)  −23.8°C 
C)  −11.4°C 
D)  1.44°C 
E)  7.12°C 
A)  −53.1°C 
B)  −23.8°C 
C)  −11.4°C 
D)  1.44°C 
E)  7.12°C

Question 11

What is the distance,in atomic radii,along any edge of a face-centered unit cell?

Accepted Answer

A)  $\frac{4 \times r}{\sqrt{3}}$ 
B)  2 × r 
C)  4 × r 
D)  $2 \sqrt{2} \times r$ 
E)  r 
A)  $\frac{4 \times r}{\sqrt{3}}$ 
B)  2 × r 
C)  4 × r 
D)  $2 \sqrt{2} \times r$ 
E)  r

Question 12

Which of the following pure substances will have hydrogen bonds? (Lone electron pairs have been omitted from these structures. )

Accepted Answer

A)  Acetone 
B)  Dimethyl ether 
C)  Methanol 
D)  Acetone and methanol 
E)  Dimethyl ether and methanol 
A)  Acetone 
B)  Dimethyl ether 
C)  Methanol 
D)  Acetone and methanol 
E)  Dimethyl ether and methanol

Which of the following statements is true for an ideal gas?

Arrange the three common unit cells in order from least dense to most dense packing.

All of the following statements concerning hydrogen bonding are correct EXCEPT

Arrange N₂,O₂,He,and Cl₂ in order from lowest to highest melting point.

Use the phase digram to answer the following questions: -According to the phase diagram ,which point corresponds to conditions where both liquid and gas phases exist?

What process occurs when a substance is at point C on the phase diagram below,and the pressure is decreased (under constant temperature)until the substance is at point E?

Nickel has a face-centered cubic cell,and its density is 8.90 g/cm³.What is the radius (in pm)of a nickel atom? (The molar mass of nickel is 58.69 g/mol)

How many unit cells share an atom which is located at a corner (or lattice point)of a simple cubic unit cell?

Freon-113,C₂Cl₃F₃,has an enthalpy of vaporization of 27.04 kJ/mol and a normal boiling point of 48°C.At what temperature is the vapor pressure of Freon-113 equal to 76.0 mm Hg? (R = 8.31 J/K.mol)

What is the distance,in atomic radii,along any edge of a face-centered unit cell?

Which of the following pure substances will have hydrogen bonds? (Lone electron pairs have been omitted from these structures. )

Matter and Measurements

Atoms, molecules, and Ions

Mass Relations in Chemistry;stoichiometry

Reactions in Aqueous Solution

Gases

Electronic Structure and the Periodic Table

Covalent Bonding

Thermochemistry

Solutions

Rate of Reaction

Gaseous Chemical Equilibrium

Acids and Bases

Equilibria in Acid-Base Solutions

Complex Ion and Precipitation Equilibria

Spontaneity of Reaction

Electrochemistry

Nuclear Reactions

Complex Ions

Chemistry of the Metals

Chemistry of the Nonmetals

Organic Chemistry

Organic Polymers, natural and Synthetic

Filters

Exam 9: Liquids and Solids

Which of the following statements is true for an ideal gas?

Arrange the three common unit cells in order from least dense to most dense packing.

All of the following statements concerning hydrogen bonding are correct EXCEPT

Arrange N2,O2,He,and Cl2 in order from lowest to highest melting point.

Use the phase digram to answer the following questions: -According to the phase diagram ,which point corresponds to conditions where both liquid and gas phases exist?

What process occurs when a substance is at point C on the phase diagram below,and the pressure is decreased (under constant temperature)until the substance is at point E?

Nickel has a face-centered cubic cell,and its density is 8.90 g/cm3.What is the radius (in pm)of a nickel atom? (The molar mass of nickel is 58.69 g/mol)

How many unit cells share an atom which is located at a corner (or lattice point)of a simple cubic unit cell?

Freon-113,C2Cl3F3,has an enthalpy of vaporization of 27.04 kJ/mol and a normal boiling point of 48°C.At what temperature is the vapor pressure of Freon-113 equal to 76.0 mm Hg? (R = 8.31 J/K.mol)

What is the distance,in atomic radii,along any edge of a face-centered unit cell?

Which of the following pure substances will have hydrogen bonds? (Lone electron pairs have been omitted from these structures. )

Matter and Measurements

Atoms, molecules, and Ions

Mass Relations in Chemistry;stoichiometry

Reactions in Aqueous Solution

Gases

Electronic Structure and the Periodic Table

Covalent Bonding

Thermochemistry

Solutions

Rate of Reaction

Gaseous Chemical Equilibrium

Acids and Bases

Equilibria in Acid-Base Solutions

Complex Ion and Precipitation Equilibria

Spontaneity of Reaction

Electrochemistry

Nuclear Reactions

Complex Ions

Chemistry of the Metals

Chemistry of the Nonmetals

Organic Chemistry

Organic Polymers, natural and Synthetic

Filters

Arrange N₂,O₂,He,and Cl₂ in order from lowest to highest melting point.

Nickel has a face-centered cubic cell,and its density is 8.90 g/cm³.What is the radius (in pm)of a nickel atom? (The molar mass of nickel is 58.69 g/mol)

Freon-113,C₂Cl₃F₃,has an enthalpy of vaporization of 27.04 kJ/mol and a normal boiling point of 48°C.At what temperature is the vapor pressure of Freon-113 equal to 76.0 mm Hg? (R = 8.31 J/K.mol)