Question 1

The metal lithium crystallizes in a body-centered cubic lattice.If the density of lithium is 0.535 g/cm3,what is the unit cell edge length?​

Accepted Answer

A) 350​ pm 
B) ​63.4​ pm 
C) 183​​ pm 
D) ​​50.3 pm 
E) ​278​ pm 
A) 350​ pm 
B) ​63.4​ pm 
C) 183​​ pm 
D) ​​50.3 pm 
E) ​278​ pm

Question 2

Which of the following pure substances has the lowest melting point?

Accepted Answer

A) LiBr 
B) RbBr 
C) CsBr 
D) KBr 
E) NaBr 
A) LiBr 
B) RbBr 
C) CsBr 
D) KBr 
E) NaBr

Question 3

Which of the following best describes silane (SiH4)at room temperature and pressure?

Accepted Answer

A) ionic solid 
B) covalent network solid 
C) nonpolar molecular gas 
D) polar molecular gas 
E) metallic solid 
A) ionic solid 
B) covalent network solid 
C) nonpolar molecular gas 
D) polar molecular gas 
E) metallic solid

Question 4

Which of the following pure substances has the highest melting point?

Accepted Answer

A) KBr 
B) NaCl 
C) NaF 
D) CsI 
E) LiF 
A) KBr 
B) NaCl 
C) NaF 
D) CsI 
E) LiF

Question 5

At 25°C,the vapor pressure of diethyl ether,(CH3CH2)2O,is higher than the vapor pressure of its isomer n-butanol,CH3CH2CH2CH2OH,because

Accepted Answer

A) diethyl ether has a higher density than n-butanol. 
B) diethyl ether has weaker intermolecular forces than n-butanol. 
C) diethyl ether has a lower critical temperature than n-butanol. 
D) diethyl ether has a higher surface tension than n-butanol. 
E) diethyl ether has weaker intramolecular forces than n-butanol. 
A) diethyl ether has a higher density than n-butanol. 
B) diethyl ether has weaker intermolecular forces than n-butanol. 
C) diethyl ether has a lower critical temperature than n-butanol. 
D) diethyl ether has a higher surface tension than n-butanol. 
E) diethyl ether has weaker intramolecular forces than n-butanol.

Question 6

Which compound has the lowest standard enthalpy of vaporization at 25°C?

Accepted Answer

A) C6H14 
B) C8H16 
C) C5H12 
D) C8H18 
E) C7H16 
A) C6H14 
B) C8H16 
C) C5H12 
D) C8H18 
E) C7H16

Question 7

The metal rubidium crystallizes in a body-centered cubic lattice.If the radius of rubidium is 248 pm,what is the unit cell edge length?

Accepted Answer

A) 572 pm 
B) 496 pm 
C) 330 pm 
D) 248 pm 
E) 107 pm 
A) 572 pm 
B) 496 pm 
C) 330 pm 
D) 248 pm 
E) 107 pm

Question 8

Which of the following pure substances has the highest normal boiling point?

Accepted Answer

A) HI 
B) HCl 
C) HF 
D) H2S 
E) HBr 
A) HI 
B) HCl 
C) HF 
D) H2S 
E) HBr

Question 9

Which of the following is a molecular solid?

Accepted Answer

A) NaCl 
B) CH4 
C) SiO2 
D) C(graphite) 
E) C(diamond) 
A) NaCl 
B) CH4 
C) SiO2 
D) C(graphite) 
E) C(diamond)

Question 10

The number of nearest-neighbor atoms of an atom is called its _____.

Accepted Answer

A) ​coordination number 
B) ​sequence number 
C) ​quantum number 
D) ​lookup number 
E) ​system number 
A) ​coordination number 
B) ​sequence number 
C) ​quantum number 
D) ​lookup number 
E) ​system number

Question 11

Which of the following substances has the weakest intermolecular forces?

Accepted Answer

A) I2 
B) C8H18 
C) SiH4 
D) CH3CH2CH2CH2OH 
E) SbCl3 
A) I2 
B) C8H18 
C) SiH4 
D) CH3CH2CH2CH2OH 
E) SbCl3

Question 12

The enthalpy of fusion of aluminum is 10.7 kJ/mol.How many grams of aluminum can be melted by adding 81.4 kJ of energy to the metal at its melting point?

Accepted Answer

A)    g 
B) 32.2g 
C) 3.01 g 
D) 7.6 g 
E)    g 
A)    g 
B) 32.2g 
C) 3.01 g 
D) 7.6 g 
E)    g

Question 13

Which of the following is the strongest intermolecular force present in dry ice,CO2(s)?

Accepted Answer

A) covalent bonding 
B) hydrogen bonding 
C) ionic bonding 
D) London forces 
E) metallic bonding 
A) covalent bonding 
B) hydrogen bonding 
C) ionic bonding 
D) London forces 
E) metallic bonding

Question 14

The process represented by the equation C10H8(s)→ C10H8(g)is

Accepted Answer

A) melting. 
B) liquefaction. 
C) sublimation. 
D) condensation. 
E) fusion. 
A) melting. 
B) liquefaction. 
C) sublimation. 
D) condensation. 
E) fusion.

Question 15

Which of the following statements concerning liquids is incorrect?

Accepted Answer

A) The volume of a liquid changes very little with pressure. 
B) Liquids are relatively incompressible. 
C) Liquid molecules move slowly compared to solids. 
D) Non-volatile liquids have low vapor pressures at room temperature. 
E) The molecules of a liquid are in constant random motion. 
A) The volume of a liquid changes very little with pressure. 
B) Liquids are relatively incompressible. 
C) Liquid molecules move slowly compared to solids. 
D) Non-volatile liquids have low vapor pressures at room temperature. 
E) The molecules of a liquid are in constant random motion.

Question 16

Which substance can be described as cations bonded together by mobile electrons?

Accepted Answer

A) S8(s) 
B) Ag(s) 
C) HCl(l) 
D) KCl(s) 
E) Kr(l) 
A) S8(s) 
B) Ag(s) 
C) HCl(l) 
D) KCl(s) 
E) Kr(l)

Question 17

Van der Waals forces must be broken to melt this type of solid.

Accepted Answer

A) A covalent network solid. 
B) A metallic solid. 
C) A molecular solid. 
D) An ionic solid. 
E) none of the above 
A) A covalent network solid. 
B) A metallic solid. 
C) A molecular solid. 
D) An ionic solid. 
E) none of the above

Question 18

Which of the following pure substances has the highest normal boiling point?

Accepted Answer

A) H2O 
B) CF4 
C) CsF 
D) CaF2 
E) KF 
A) H2O 
B) CF4 
C) CsF 
D) CaF2 
E) KF

Question 19

When two water molecule form a hydrogen bond,which atoms are involved in the interaction?

Accepted Answer

A) Two hydrogens from one molecule and one hydrogen from the other molecule 
B) An oxygen from one molecule and an oxygen from the other molecule 
C) Two hydrogens from one molecule and one oxygen from the other molecule 
D) A hydrogen from one molecule and a hydrogen from the other molecule 
E) A hydrogen from one molecule and an oxygen from the other molecule 
A) Two hydrogens from one molecule and one hydrogen from the other molecule 
B) An oxygen from one molecule and an oxygen from the other molecule 
C) Two hydrogens from one molecule and one oxygen from the other molecule 
D) A hydrogen from one molecule and a hydrogen from the other molecule 
E) A hydrogen from one molecule and an oxygen from the other molecule

Question 20

Rank the following molecules in order of increasing normal boiling point: CH3CH2OH,CH3CH2CH2OH,CH3CH2OCH3.

Accepted Answer

A) lowest CH3CH2CH2OH,CH3CH2OCH3,CH3CH2OH highest. 
B) lowest CH3CH2OH,CH3CH2OCH3,CH3CH2CH2OH highest. 
C) lowest CH3CH2CH2OH,CH3CH2OH,CH3CH2OCH3 highest. 
D) lowest CH3CH2OCH3,CH3CH2OH,CH3CH2CH2OH highest. 
E) lowest CH3CH2OCH3,CH3CH2CH2OH,CH3CH2OH highest. 
A) lowest CH3CH2CH2OH,CH3CH2OCH3,CH3CH2OH highest. 
B) lowest CH3CH2OH,CH3CH2OCH3,CH3CH2CH2OH highest. 
C) lowest CH3CH2CH2OH,CH3CH2OH,CH3CH2OCH3 highest. 
D) lowest CH3CH2OCH3,CH3CH2OH,CH3CH2CH2OH highest. 
E) lowest CH3CH2OCH3,CH3CH2CH2OH,CH3CH2OH highest.

Exam 11: States of Matter; Liquids and Solids

The metal lithium crystallizes in a body-centered cubic lattice.If the density of lithium is 0.535 g/cm3,what is the unit cell edge length?​

Which of the following pure substances has the lowest melting point?

Which of the following best describes silane (SiH4)at room temperature and pressure?

Which of the following pure substances has the highest melting point?

At 25°C,the vapor pressure of diethyl ether,(CH3CH2)2O,is higher than the vapor pressure of its isomer n-butanol,CH3CH2CH2CH2OH,because

Which compound has the lowest standard enthalpy of vaporization at 25°C?

The metal rubidium crystallizes in a body-centered cubic lattice.If the radius of rubidium is 248 pm,what is the unit cell edge length?

Which of the following pure substances has the highest normal boiling point?

Which of the following is a molecular solid?

The number of nearest-neighbor atoms of an atom is called its _____.

Which of the following substances has the weakest intermolecular forces?

The enthalpy of fusion of aluminum is 10.7 kJ/mol.How many grams of aluminum can be melted by adding 81.4 kJ of energy to the metal at its melting point?

Which of the following is the strongest intermolecular force present in dry ice,CO2(s)?

The process represented by the equation C10H8(s)→ C10H8(g)is

Which of the following statements concerning liquids is incorrect?

Which substance can be described as cations bonded together by mobile electrons?

Van der Waals forces must be broken to melt this type of solid.

Which of the following pure substances has the highest normal boiling point?

When two water molecule form a hydrogen bond,which atoms are involved in the interaction?

Rank the following molecules in order of increasing normal boiling point: CH3CH2OH,CH3CH2CH2OH,CH3CH2OCH3.

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

The metal lithium crystallizes in a body-centered cubic lattice.If the density of lithium is 0.535 g/cm³,what is the unit cell edge length?

Which of the following best describes silane (SiH₄)at room temperature and pressure?

At 25°C,the vapor pressure of diethyl ether,(CH₃CH₂)₂O,is higher than the vapor pressure of its isomer n-butanol,CH₃CH₂CH₂CH₂OH,because

Which of the following is the strongest intermolecular force present in dry ice,CO₂(s)?

The process represented by the equation C₁₀H₈(s)→ C₁₀H₈(g)is

Rank the following molecules in order of increasing normal boiling point: CH₃CH₂OH,CH₃CH₂CH₂OH,CH₃CH₂OCH₃.