Question 1

Helium atoms do not combine to form He2 molecules, yet He atoms do attract one another weakly through

Accepted Answer

A) dipole-dipole forces. 
B) ion-dipole forces. 
C) dispersion forces. 
D) dipole-induced dipole forces. 
E) hydrogen bonding. 
A) dipole-dipole forces. 
B) ion-dipole forces. 
C) dispersion forces. 
D) dipole-induced dipole forces. 
E) hydrogen bonding.

Question 2

Use the following data to determine the molar heat of vaporization of chlorine.

Accepted Answer

A) 34,700 J 
B) 21,900 J 
C) 317 J 
D) 712 J 
E) 9.99 kJ 
A) 34,700 J 
B) 21,900 J 
C) 317 J 
D) 712 J 
E) 9.99 kJ

Question 3

Osmium tetroxide, OsO4, is a soft crystal that melts at 40°C.The liquid does not conduct electricity.What kind of crystal is this?

Accepted Answer

Question 4

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm3.Calculate the length of the edge of the unit cell in pm.

Accepted Answer

Question 5

Suppose the atoms in a two-dimensional crystal have the following arrangement:   On the drawing above, sketch the unit cell of this crystal.

Accepted Answer

The answer of Suppose the atoms in a two-dimensional crystal...

Question 6

Which one of the following crystallizes in a metallic lattice?

Accepted Answer

A) C 
B) NaMnO4 
C) K 
D) LiClO4 
E) K2Cr2O7 
A) C 
B) NaMnO4 
C) K 
D) LiClO4 
E) K2Cr2O7

Question 7

Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20°C to convert it to liquid water at 60.0°C. Given: specific heat (ice)= 2.1 J/g·°C; specific heat (water)= 4.18 J/g·°C; $\Delta$Hfus = 6.0 kJ/mol.

Accepted Answer

A) 420 J 
B) 2,900 J 
C) 6,300 J 
D) 63 kJ 
E) 7.5 J 
A) 420 J 
B) 2,900 J 
C) 6,300 J 
D) 63 kJ 
E) 7.5 J

Question 8

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the platinum atom?

Accepted Answer

A) 69 pm 
B) 98 pm 
C) 139 pm 
D) 196 pm 
E) 277 pm 
A) 69 pm 
B) 98 pm 
C) 139 pm 
D) 196 pm 
E) 277 pm

Question 9

Which one of the following substances crystallizes as a covalent crystal?

Accepted Answer

A) CaO 
B) SiO2 
C) CO2 
D) Pb 
E) KMnO4 
A) CaO 
B) SiO2 
C) CO2 
D) Pb 
E) KMnO4

Question 10

Potassium crystallizes in a body-centered cubic lattice.How many atoms are there per 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 11

How much energy (heat)is required to convert 52.0 g of ice at -10.0°C to steam at 100°C?

Accepted Answer

A) 2,570 kJ 
B) 1,086 kJ 
C) 157.8 kJ 
D) 40.2 kJ 
E) 22,957 kJ 
A) 2,570 kJ 
B) 1,086 kJ 
C) 157.8 kJ 
D) 40.2 kJ 
E) 22,957 kJ

Question 12

Of the given pair of compounds, which would have the higher boiling point?
CH3Cl or CH4

Accepted Answer

Question 13

Which is expected to have a higher boiling point, C5H12 or C(CH3)4?

Accepted Answer

Question 14

Indicate all the types of intermolecular forces of attraction in CH2O(g).

Accepted Answer

dipole-dip

Question 15

Each of the following substances is a liquid at -50°C. Place these liquids in order of increasing vapor pressure: dimethyl ether (CH3OCH3), propane (C3H8), and ethanol (CH3CH2OH).

Accepted Answer

A) ethanol < propane < dimethyl ether 
B) ethanol < dimethyl ether < propane 
C) propane < dimethyl ether < ethanol 
D) dimethyl ether < ethanol < propane 
E) propane < ethanol < dimethyl ether 
A) ethanol < propane < dimethyl ether 
B) ethanol < dimethyl ether < propane 
C) propane < dimethyl ether < ethanol 
D) dimethyl ether < ethanol < propane 
E) propane < ethanol < dimethyl ether

Question 16

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Accepted Answer

A) PH3 
B) He 
C) H2S 
D) CH4 
E) CH3OH 
A) PH3 
B) He 
C) H2S 
D) CH4 
E) CH3OH

Question 17

Butter melts over a range of temperature, rather than with a sharp melting point. Butter is classified as a/an

Accepted Answer

A) metallic crystal. 
B) covalent solid. 
C) molecular crystal. 
D) amorphous solid. 
E) ionic crystal. 
A) metallic crystal. 
B) covalent solid. 
C) molecular crystal. 
D) amorphous solid. 
E) ionic crystal.

Question 18

Which of the following liquids would have the lowest viscosity at 25°C?

Accepted Answer

The answer of Which of the following liquids would have...

Question 19

Given that the heat of vaporization of mercury is 59.0 kJ/mol and the vapor pressure of mercury is 0.0017 torr at 25°C, calculate the normal boiling point of mercury.

Accepted Answer

380°C (the

Question 20

The structural form of the element Ge closely resembles the structure of

Accepted Answer

A) C (diamond). 
B) N (diatomic). 
C) As (tetrahedral). 
D) S (S8 ring). 
E) Kr (monatomic). 
A) C (diamond). 
B) N (diatomic). 
C) As (tetrahedral). 
D) S (S8 ring). 
E) Kr (monatomic).

Exam 11: Intermolecular Forces and Liquids and Solids

Helium atoms do not combine to form He2 molecules, yet He atoms do attract one another weakly through

Use the following data to determine the molar heat of vaporization of chlorine.

Osmium tetroxide, OsO4, is a soft crystal that melts at 40°C.The liquid does not conduct electricity.What kind of crystal is this?

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm3.Calculate the length of the edge of the unit cell in pm.

Suppose the atoms in a two-dimensional crystal have the following arrangement: On the drawing above, sketch the unit cell of this crystal.

Which one of the following crystallizes in a metallic lattice?

Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20°C to convert it to liquid water at 60.0°C. Given: specific heat (ice)= 2.1 J/g·°C; specific heat (water)= 4.18 J/g·°C; Δ\DeltaΔ Hfus = 6.0 kJ/mol.

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the platinum atom?

Which one of the following substances crystallizes as a covalent crystal?

Potassium crystallizes in a body-centered cubic lattice.How many atoms are there per unit cell?

How much energy (heat)is required to convert 52.0 g of ice at -10.0°C to steam at 100°C?

Of the given pair of compounds, which would have the higher boiling point? CH3Cl or CH4

Which is expected to have a higher boiling point, C5H12 or C(CH3)4?

Indicate all the types of intermolecular forces of attraction in CH2O(g).

Each of the following substances is a liquid at -50°C. Place these liquids in order of increasing vapor pressure: dimethyl ether (CH3OCH3), propane (C3H8), and ethanol (CH3CH2OH).

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Butter melts over a range of temperature, rather than with a sharp melting point. Butter is classified as a/an

Which of the following liquids would have the lowest viscosity at 25°C?

Given that the heat of vaporization of mercury is 59.0 kJ/mol and the vapor pressure of mercury is 0.0017 torr at 25°C, calculate the normal boiling point of mercury.

The structural form of the element Ge closely resembles the structure of

Chemistry: The Study of Change

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Mass Relationships in Chemical Reactions

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Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

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Helium atoms do not combine to form He₂ molecules, yet He atoms do attract one another weakly through

Osmium tetroxide, OsO₄, is a soft crystal that melts at 40°C.The liquid does not conduct electricity.What kind of crystal is this?

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm³.Calculate the length of the edge of the unit cell in pm.

Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20°C to convert it to liquid water at 60.0°C. Given: specific heat (ice)= 2.1 J/g·°C; specific heat (water)= 4.18 J/g·°C; $\Delta$ H_fus = 6.0 kJ/mol.

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm³. What is the radius of the platinum atom?

Of the given pair of compounds, which would have the higher boiling point? CH₃Cl or CH₄

Which is expected to have a higher boiling point, C₅H₁₂ or C(CH₃)₄?

Indicate all the types of intermolecular forces of attraction in CH₂O(g).

Each of the following substances is a liquid at -50°C. Place these liquids in order of increasing vapor pressure: dimethyl ether (CH₃OCH₃), propane (C₃H₈), and ethanol (CH₃CH₂OH)_.