Question 1

What are all the intermolecular forces that are responsible for the existence of the molecular solid oxalic acid, H2C2O4?

Accepted Answer

A)   Dipole-dipole, London forces, and hydrogen bonding
B)   Dipole-dipole and London forces
C)   Hydrogen bonding and dipole-dipole
D)   London forces
E)   Dipole-dipole and ion-ionF) B) and C)
G) A) and E)

Question 2

Which of the following has the lowest boiling point?

Accepted Answer

A)   HF
B)   GeH4 
C)   SiH4 
D)   PH3 
E)   H2SeF) D) and E)
G) A) and D)

Question 3

Concrete, steel,And cement are examples of what type of materials?

Accepted Answer

A)   Malleable.  
B)   Alloys.  
C)   Electrically conductive. 
D)   Deformable. 
E)   Structural.F) None of the above
G) A) and E)

Question 4

Butane and 2-propanone have approximately the same boiling points.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A)   H2Se
B)   H2O
C)   H2Po
D)   H2S
E)   H2TeF) A) and B)
G) A) and C)

Question 6

Glass has numerous,microscopic and macroscopic crystalline regions.

Accepted Answer

A) True 
 B)False

Question 7

What term is used for the emission of light from molecules excited by radiation of higher frequency?

Accepted Answer

A)   Phosphorescence
B)   Fluorescence
C)   Both A and B, above.
D)   None of the above.E) All of the above
F) None of the above

Question 8

How many liters of carbon dioxide measured at 25.0 ∘\circ∘ C and 821 Torr would be produced by the combustion of 319 g of glucose, C6H12O6?

Accepted Answer

A)   3.37 L
B)   40.1 L
C)   241 L
D)   20.2 L E) B) and C)
F) A) and D)

Question 9

Consider both nitrogen and chlorine as ideal gases.
(a)What is the molar kinetic energy of nitrogen gas at 25$\omicron $C?
(b)At 25$\omicron $C,the molar kinetic energy of chlorine gas is ___________________________(equal to,greater than,
less than)the molar kinetic energy of nitrogen.

Accepted Answer

(a)3.72 kJ...

Question 10

Which of the following gases effuses slowest?

Accepted Answer

A)   Fluorine
B)   Carbon dioxide
C)   Chlorine
D)   Carbon monoxide
E)   NitrogenF) A) and B)
G) B) and D)

Question 11

A 0.479-g sample of nitrogen, oxygen or neon gas occupies a volume of 265 mL at 157 l Pa and 20.0 ο\omicron ο C.What are the molar mass and identity of the gas?

Accepted Answer

A)   14.0 g.mol-1, N
B)   32.0 g.mol-1, O2 
C)   20.1 g.mol-1, Ne
D)   16.0 g.mol-1, O
E)   28.0 g.mol-1, N2  F) A) and B)
G) A) and C)

Question 12

What is the final phase of a nano-material template synthesis?

Accepted Answer

A)   Growing the template.
B)   Layer deposition of the nano-material.
C)   Vapor deposition of the nano-material.
D)   Purification of the surface of the template membrane.
E)   Dissolving or removing the template.F) A) and B)
G) B) and C)

Question 13

Which of the following compounds is likely to adopt the cesium chloride structure?

Accepted Answer

A)   AgCl, ρ = 0.62
B)   MgO, ρ = 0.51
C)   CaO, ρ = 0.71
D)   RbI, ρ = 0.68
E)   TlCl, ρ = 0.90F) A) and B)
G) A) and C)

Question 14

Both ZnS and CaF2 have a face-centered cubic unit cell where the S2- and Ca2+ ions are closest packed in each structure .Which of the following is true?

Accepted Answer

A)   There are 4 tetrahedral holes empty in each structure.
B)   In both compounds, one-half of the tetrhedral holes are filled.
C)   In both compounds, all the tetrhedral holes are filled.
D)   In ZnS, one-half of the tetrahedral holes are filled by Zn2+ ions, whereas in CaF2 all the tetrahedral holes are filled with F- ions.
E)   There are 8 Zn2+ ions and 4 F- ions in the unit cell.F) B) and D)
G) C) and D)

Question 15

The density of the vapor of allicin, a component of garlic,Is 1.14 g.L-1 at 125 ο\omicron ο C and 175 Torr.What is the molar mass of allicin?

Accepted Answer

A)   21.6 g.mol-1
B)   50.8 g.mol-1
C)   273 g.mol-1
D)   869 g.mol-1
E)   162 g.mol-1 F) C) and D)
G) B) and D)

Question 16

To what two chemicals are most glasses not resistant?

Accepted Answer

Fluorides ...

Question 17

Why does water remain a liquid at room temperature (25°C) , when materials of very similar molecular weight,Like ammonia and methane,
Exists as gases?

Accepted Answer

A)   Water possesses greater van der Waals forces between its molecules than the others do.
B)   Water has the most extensive ability to hydrogen bond 
C)   The oxygen atom is heavier (has a greater atomic mass)  than the nitrogen or carbon atoms. 
D)   It doesn't; they all generally exist as gases at room temperature..E) A) and B)
F) A) and C)

Question 18

How does a p-n junction allow electric current to flow?

Accepted Answer

A)   With lower resistance. 
B)   In one direction only. 
C)   With higher resistance. 
D)   Directly over the band gap. 
E)   It closes the band gap. F) A) and B)
G) A) and C)

Question 19

Metals conduct electricity because electrons do not move in the "electron sea."

Accepted Answer

A) True 
 B)False

Question 20

What is graphene?

Accepted Answer

A)   A three dimensional layer of carbon atoms in a crystalline array.
B)   A double layer of carbon atoms arranged in a diamond structure.
C)   A single layer of carbon atoms arranged in a diamond structure.
D)   A double layer of hexagonally arranged carbon atoms.
E)   A single layer of hexagonally arranged carbon atoms.F) C) and D)
G) None of the above

Exam 3: States of Matter

Which of the following has the lowest boiling point?

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What is graphene?

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A 0.479-g sample of nitrogen, oxygen or neon gas occupies a volume of 265 mL at 157 l Pa and 20.0 ο\omicron ο C.What are the molar mass and identity of the gas?

Correct AnswerverifiedShow Answer

To what two chemicals are most glasses not resistant?

Correct AnswerverifiedFluorides ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Consider both nitrogen and chlorine as ideal gases. (a)What is the molar kinetic energy of nitrogen gas at 25 ο\omicron ο C? (b)At 25 ο\omicron ο C,the molar kinetic energy of chlorine gas is ___________________________(equal to,greater than, less than)the molar kinetic energy of nitrogen.

Correct Answerverified(a)3.72 kJ...View AnswerShow Answer

What is the final phase of a nano-material template synthesis?

Correct AnswerverifiedShow Answer

What term is used for the emission of light from molecules excited by radiation of higher frequency?

Correct AnswerverifiedShow Answer

Both ZnS and CaF2 have a face-centered cubic unit cell where the S2- and Ca2+ ions are closest packed in each structure .Which of the following is true?

Correct AnswerverifiedShow Answer

Why does water remain a liquid at room temperature (25°C) , when materials of very similar molecular weight,Like ammonia and methane, Exists as gases?

Correct AnswerverifiedShow Answer

Which of the following gases effuses slowest?

Correct AnswerverifiedShow Answer

Metals conduct electricity because electrons do not move in the "electron sea."

Correct AnswerverifiedShow Answer

How many liters of carbon dioxide measured at 25.0 ∘\circ∘ C and 821 Torr would be produced by the combustion of 319 g of glucose, C6H12O6?

Correct AnswerverifiedShow Answer

Butane and 2-propanone have approximately the same boiling points.

Correct AnswerverifiedShow Answer

Concrete, steel,And cement are examples of what type of materials?

Correct AnswerverifiedShow Answer

What are all the intermolecular forces that are responsible for the existence of the molecular solid oxalic acid, H2C2O4?

Correct AnswerverifiedShow Answer

The density of the vapor of allicin, a component of garlic,Is 1.14 g.L-1 at 125 ο\omicron ο C and 175 Torr.What is the molar mass of allicin?

Correct AnswerverifiedShow Answer

Which of the following compounds is likely to adopt the cesium chloride structure?

Correct AnswerverifiedShow Answer

How does a p-n junction allow electric current to flow?

Correct AnswerverifiedShow Answer

Glass has numerous,microscopic and macroscopic crystalline regions.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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A 0.479-g sample of nitrogen, oxygen or neon gas occupies a volume of 265 mL at 157 l Pa and 20.0^$\omicron$C.What are the molar mass and identity of the gas?

Correct Answer
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Correct Answer
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Fluorides ...
View Answer

Correct Answer
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Consider both nitrogen and chlorine as ideal gases. (a)What is the molar kinetic energy of nitrogen gas at 25^$\omicron$C? (b)At 25^$\omicron$C,the molar kinetic energy of chlorine gas is ___________________________(equal to,greater than, less than)the molar kinetic energy of nitrogen.

Correct Answer
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(a)3.72 kJ...
View Answer

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Correct Answer
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Both ZnS and CaF₂ have a face-centered cubic unit cell where the S^2- and Ca²⁺ ions are closest packed in each structure .Which of the following is true?

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How many liters of carbon dioxide measured at 25.0^$\circ$C and 821 Torr would be produced by the combustion of 319 g of glucose, C₆H₁₂O₆?

Correct Answer
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What are all the intermolecular forces that are responsible for the existence of the molecular solid oxalic acid, H₂C₂O₄?

Correct Answer
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The density of the vapor of allicin, a component of garlic,Is 1.14 g.L^-¹at 125^$\omicron$C and 175 Torr.What is the molar mass of allicin?

Correct Answer
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