Question 1

Determine the percentage of the total volume that is empty space in a primitive cubic structure in which all the atoms are identical.

Accepted Answer

The answer of Determine the percentage of the total volume...

Question 2

If the ratio of the radius of the cation to the anion in a 1:1 compound is 0.800,

Accepted Answer

A) The compound adopts the rock-salt structure. 
B) The coordination number of the cation and anion are 6 and 6. 
C) The compound adopts the same structure as calcium fluorite. 
D) Each cation occupies one-half of the tetrahedral holes of each anion cube. 
E) Each cation occupies all the cubic holes in the center of each anion cube. 
A) The compound adopts the rock-salt structure. 
B) The coordination number of the cation and anion are 6 and 6. 
C) The compound adopts the same structure as calcium fluorite. 
D) Each cation occupies one-half of the tetrahedral holes of each anion cube. 
E) Each cation occupies all the cubic holes in the center of each anion cube.

Question 3

What is the coordination number of magnesium in MgO? The ionic radii of Mg2+ and O2-are 72 and 140 pm,respectively.

Accepted Answer

A) 4 
B) 2 
C) 8 
D) 6 
E) 12 
A) 4 
B) 2 
C) 8 
D) 6 
E) 12

Question 4

What is the coordination number of silver in AgCl? The ionic radii of Ag+ and Cl- are 113 and 181 pm,respectively.

Accepted Answer

A) 4 
B) 2 
C) 6 
D) 8 
E) 12 
A) 4 
B) 2 
C) 6 
D) 8 
E) 12

Question 5

Predict which of the following has the lowest boiling point.

Accepted Answer

A) SbH3  
B) AsH3  
C) NH3  
D) BiH3  
E) PH3  
A) SbH3  
B) AsH3  
C) NH3  
D) BiH3  
E) PH3

Question 6

Sodium has a body-centered cubic unit cell.If the atomic radius of sodium is 190 pm,what is the density of sodium?

Accepted Answer

The answer of Sodium has a body-centered cubic unit cell.If...

Question 7

The mass of a face-centered cubic unit cell is

Accepted Answer

A) Two times the mass of one atom. 
B) Five times the mass of one atom. 
C) Equal to the mass of one atom. 
D) Six times the mass of one atom. 
E) Four times the mass of one atom. 
A) Two times the mass of one atom. 
B) Five times the mass of one atom. 
C) Equal to the mass of one atom. 
D) Six times the mass of one atom. 
E) Four times the mass of one atom.

Question 8

The density of solid krypton is 2.16 g.cm-3.Krypton crystallizes in a cubic close-packed structure; estimate the atomic radius.

Accepted Answer

A) 66.5 pm 
B) 225 pm 
C) 113 pm 
D) 318 pm 
E) 450 pm 
A) 66.5 pm 
B) 225 pm 
C) 113 pm 
D) 318 pm 
E) 450 pm

Question 9

Viscosity usually decreases with increasing temperature.True or false?

Accepted Answer

A) True 
 B)False

Question 10

Superconductivity is the loss of all electrical resistance when a substance is cooled below a certain characteristic transition temperature.True or false?

Accepted Answer

A) True 
 B)False

Question 11

Which of the following are heterogeneous alloys?

Accepted Answer

A) Mercury amalgam and tin-lead solder 
B) Brass 
C) Bronze 
D) Tin-lead solder and bronze 
E) Coinage cupronickel 
A) Mercury amalgam and tin-lead solder 
B) Brass 
C) Bronze 
D) Tin-lead solder and bronze 
E) Coinage cupronickel

Question 12

Metals with a hexagonal close-packed structure have/do not have slip planes and as a result are malleable/brittle.

Accepted Answer

The answer of Metals with a hexagonal close-packed structure have/do...

Question 13

The atomic radius of magnesium is 160 pm.Estimate its density,given that the metal has a close-packed structure.

Accepted Answer

A) 1.74 g.cm-3  
B) 0.435 g.cm-3  
C) 10.5 g.cm-3  
D) 4.45 g.cm-3  
E) 2.78 g.cm-3  
A) 1.74 g.cm-3  
B) 0.435 g.cm-3  
C) 10.5 g.cm-3  
D) 4.45 g.cm-3  
E) 2.78 g.cm-3

Question 14

All the following are units of surface tension except

Accepted Answer

A) mJ.m-2. 
B) N.m. 
C) J.m-2 
D) mN.m-1. 
E) kg.s-2. 
A) mJ.m-2. 
B) N.m. 
C) J.m-2 
D) mN.m-1. 
E) kg.s-2.

Question 15

Isotropic liquids have viscosities that are the same in every direction.True or false?

Accepted Answer

A) True 
 B)False

Question 16

Which of the following statements is true?

Accepted Answer

A) 1,1-Dichloro-2-methyl-1-propene has a higher boiling point than trans-2,3-dichloro-2-butene. 
B) CH4 has a higher boiling point than CCl4. 
C) o-Dichlorobenzene has a lower boiling point than p-dichlorobenzene. 
D) HI has a lower boiling point than HBr. 
E) Butane,C4H10,has a higher boiling point than acetone,CH3COCH3. 
A) 1,1-Dichloro-2-methyl-1-propene has a higher boiling point than trans-2,3-dichloro-2-butene. 
B) CH4 has a higher boiling point than CCl4. 
C) o-Dichlorobenzene has a lower boiling point than p-dichlorobenzene. 
D) HI has a lower boiling point than HBr. 
E) Butane,C4H10,has a higher boiling point than acetone,CH3COCH3.

Question 17

All the elements listed below can exist as network solids except

Accepted Answer

A) O. 
B) Si. 
C) B. 
D) As. 
E) C. 
A) O. 
B) Si. 
C) B. 
D) As. 
E) C.

Question 18

Predict which of the following liquids has the lowest enthalpy of vaporization.

Accepted Answer

A) H2Se 
B) H2O 
C) H2Po 
D) H2S 
E) H2Te 
A) H2Se 
B) H2O 
C) H2Po 
D) H2S 
E) H2Te

Question 19

In the zinc-blende structure (ZnS),the cations occupy half the tetrahedral holes.True or false?

Accepted Answer

A) True 
 B)False

Question 20

Which of the following liquids has the lowest viscosity?

Accepted Answer

A) Acetone 
B) Ethanol 
C) Phosphoric acid 
D) Benzene 
A) Acetone 
B) Ethanol 
C) Phosphoric acid 
D) Benzene

Determine the percentage of the total volume that is empty space in a primitive cubic structure in which all the atoms are identical.

If the ratio of the radius of the cation to the anion in a 1:1 compound is 0.800,

What is the coordination number of magnesium in MgO? The ionic radii of Mg²⁺ and O^2-are 72 and 140 pm,respectively.

What is the coordination number of silver in AgCl? The ionic radii of Ag⁺ and Cl^- are 113 and 181 pm,respectively.

Predict which of the following has the lowest boiling point.

Sodium has a body-centered cubic unit cell.If the atomic radius of sodium is 190 pm,what is the density of sodium?

The mass of a face-centered cubic unit cell is

The density of solid krypton is 2.16 g.cm^-³.Krypton crystallizes in a cubic close-packed structure; estimate the atomic radius.

Viscosity usually decreases with increasing temperature.True or false?

Superconductivity is the loss of all electrical resistance when a substance is cooled below a certain characteristic transition temperature.True or false?

Which of the following are heterogeneous alloys?

Metals with a hexagonal close-packed structure have/do not have slip planes and as a result are malleable/brittle.

The atomic radius of magnesium is 160 pm.Estimate its density,given that the metal has a close-packed structure.

All the following are units of surface tension except

Isotropic liquids have viscosities that are the same in every direction.True or false?

Which of the following statements is true?

All the elements listed below can exist as network solids except

Predict which of the following liquids has the lowest enthalpy of vaporization.

In the zinc-blende structure (ZnS),the cations occupy half the tetrahedral holes.True or false?

Which of the following liquids has the lowest viscosity?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

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The Elements: The D Block

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Exam 6: Liquids and Solids

Determine the percentage of the total volume that is empty space in a primitive cubic structure in which all the atoms are identical.

If the ratio of the radius of the cation to the anion in a 1:1 compound is 0.800,

What is the coordination number of magnesium in MgO? The ionic radii of Mg2+ and O2-are 72 and 140 pm,respectively.

What is the coordination number of silver in AgCl? The ionic radii of Ag+ and Cl- are 113 and 181 pm,respectively.

Predict which of the following has the lowest boiling point.

Sodium has a body-centered cubic unit cell.If the atomic radius of sodium is 190 pm,what is the density of sodium?

The mass of a face-centered cubic unit cell is

The density of solid krypton is 2.16 g.cm-3.Krypton crystallizes in a cubic close-packed structure; estimate the atomic radius.

Viscosity usually decreases with increasing temperature.True or false?

Superconductivity is the loss of all electrical resistance when a substance is cooled below a certain characteristic transition temperature.True or false?

Which of the following are heterogeneous alloys?

Metals with a hexagonal close-packed structure have/do not have slip planes and as a result are malleable/brittle.

The atomic radius of magnesium is 160 pm.Estimate its density,given that the metal has a close-packed structure.

All the following are units of surface tension except

Isotropic liquids have viscosities that are the same in every direction.True or false?

Which of the following statements is true?

All the elements listed below can exist as network solids except

Predict which of the following liquids has the lowest enthalpy of vaporization.

In the zinc-blende structure (ZnS),the cations occupy half the tetrahedral holes.True or false?

Which of the following liquids has the lowest viscosity?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

What is the coordination number of magnesium in MgO? The ionic radii of Mg²⁺ and O^2-are 72 and 140 pm,respectively.

What is the coordination number of silver in AgCl? The ionic radii of Ag⁺ and Cl^- are 113 and 181 pm,respectively.

The density of solid krypton is 2.16 g.cm^-³.Krypton crystallizes in a cubic close-packed structure; estimate the atomic radius.