Question 1

What contaminant causes the red "terra cotta" color in most ceramics?

Accepted Answer

The answer of What contaminant causes the red "terra cotta"...

Question 2

What elements are the major components of almost all glass?

Accepted Answer

A)  Si and Fe. 
B)  Si and O. 
C)  S and O.  
D)  Fe and O.  
E)  None of the above.  
A)  Si and Fe. 
B)  Si and O. 
C)  S and O.  
D)  Fe and O.  
E)  None of the above.

Question 3

Which statement about a semi-conductor is correct?

Accepted Answer

A)  When it conducts, its resistance is extremely high. 
B)  When it conducts, it does so with 0 resistance. 
C)  Its resistance increases as the temperature increases. 
D)  Its resistance decreases as the temperature increases. 
A)  When it conducts, its resistance is extremely high. 
B)  When it conducts, it does so with 0 resistance. 
C)  Its resistance increases as the temperature increases. 
D)  Its resistance decreases as the temperature increases.

Question 4

An amorphous solid is one in which the atoms, ions,or molecules lie in a random jumble with no order.

Accepted Answer

A) True 
 B)False

Question 5

Ferrofluids contain suspensions of coarsely divided elemental iron.

Accepted Answer

A) True 
 B)False

Question 6

The ability of a semi-conductor to carry an electric current can be enhanced by adding electrons to the conduction band.

Accepted Answer

A) True 
 B)False

Question 7

How is lithography used to create a nano-material?

Accepted Answer

A)  By carving a material into the desired shape. 
B)  By etching a material into the desired shape.. 
C)  By encouraging molecules to assemble themselves. 
D)  By making use of specific intermolecular attractions. 
A)  By carving a material into the desired shape. 
B)  By etching a material into the desired shape.. 
C)  By encouraging molecules to assemble themselves. 
D)  By making use of specific intermolecular attractions.

Question 8

The atomic radius of aluminum is 143 pm .Estimate its density,Given that the metal has a close-packed structure.

Accepted Answer

A)  3.87 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
B)  5.54 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
C)  7.92 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
D)  16.3 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
E)  2.71 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
A)  3.87 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
B)  5.54 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
C)  7.92 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
D)  16.3 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0 
E)  2.71 g.cmS1U1P1-S1S1P0S1U1P13 S1S1P0

Question 9

Consider two cylinders of gas,both with a volume of 25 L and at 1 atm and 25$\omicron $C.If one cylinder contains nitrogen gas and the other argon,which of the following statements are true and which are false.
(a)The temperature of the gases is different.
(b)The average molecular speed of the gases is the same.
(c)The average kinetic energy of the gases is the same.

Accepted Answer

(a)False
(

Question 10

If the average speed of a water molecule at 25S1U1P1$\omicron $S1S1P0C is 640 m.sS1U1P1-S1S1P0S1U1P11S1S1P0, what is the average speed at 100S1U1P1$\circ$S1S1P0C?

Accepted Answer

A)  572 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
B)  5120 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
C)  801 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
D)  320 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
E)  1280 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
A)  572 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
B)  5120 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
C)  801 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
D)  320 m.sS1U1P1-S1S1P0S1U1P11S1S1P0 
E)  1280 m.sS1U1P1-S1S1P0S1U1P11S1S1P0

Question 11

Which of the following has the highest molar enthalpy of vaporization?

Accepted Answer

A)  Xe 
B)  LiBr 
C)  H2O 
D)  I2 
E)  Hg 
A)  Xe 
B)  LiBr 
C)  H2O 
D)  I2 
E)  Hg

Question 12

All the following are units of surface tension except

Accepted Answer

A)  mJ.mS1U1P1-2S1S1P0.S1U1P1 S1S1P0 S1U1P1 S1S1P0 
B)  N.m. 
C)  J.mS1U1P1-2S1S1P0.S1U1P1 S1S1P0 
D)  mN.mS1U1P1-1S1S1P0. 
E)  kg.sS1U1P1-2S1S1P0. 
A)  mJ.mS1U1P1-2S1S1P0.S1U1P1 S1S1P0 S1U1P1 S1S1P0 
B)  N.m. 
C)  J.mS1U1P1-2S1S1P0.S1U1P1 S1S1P0 
D)  mN.mS1U1P1-1S1S1P0. 
E)  kg.sS1U1P1-2S1S1P0.

Question 13

Order the following cubic unit cells from highest percentage of empty space to lowest:Body-centered,Primitive,Face-centered.

Accepted Answer

A)  primitive > body-centered > face-centered 
B)  body-centered > primitive > face-centered 
C)  primitive > face-centered > body-centered 
D)  body-centered > face-centered >primitive 
E)  face-centered > body centered > primitive 
A)  primitive > body-centered > face-centered 
B)  body-centered > primitive > face-centered 
C)  primitive > face-centered > body-centered 
D)  body-centered > face-centered >primitive 
E)  face-centered > body centered > primitive

Question 14

What mass of zinc metal is required to produce 12.0 L of hydrogen gas at exactly 0°C and 2.00 atm by reaction of the metal with excess strong acid?

Accepted Answer

A)  70.0 g 
B)  35.0 g 
C)  36.0 g 
D)  1,912 g 
E)  0.02 g 
A)  70.0 g 
B)  35.0 g 
C)  36.0 g 
D)  1,912 g 
E)  0.02 g

Question 15

Lithium metal reacts with nitrogen gas to produce lithium nitride .
What volume of nitrogen gas at 2.00 atm and 175S1U1P1$\omicron $S1S1P0C is required to produce 75.0 g of lithium nitride?

Accepted Answer

A)  30.9 L 
B)  119 L 
C)  79.2 L 
D)  39.6 L 
E)  15.5 L 
A)  30.9 L 
B)  119 L 
C)  79.2 L 
D)  39.6 L 
E)  15.5 L

Question 16

How is boron nitride formed?

Accepted Answer

A)  Boron is heated gently in ammonia. 
B)  Boron is heated to white heat in ammonia. 
C)  Boron is heated gently in elemental nitrogen. 
D)  Boron is heated to white heat in elemental nitrogen. 
E)  None of the above; boron nitride is naturally occuring. 
A)  Boron is heated gently in ammonia. 
B)  Boron is heated to white heat in ammonia. 
C)  Boron is heated gently in elemental nitrogen. 
D)  Boron is heated to white heat in elemental nitrogen. 
E)  None of the above; boron nitride is naturally occuring.

Question 17

Molecular solids are held together by weak intermolecular forces.

Accepted Answer

A) True 
 B)False

Question 18

What is the density of xenon gas at 750 kPa and 25S1U1P1$\circ$S1S1P0C?

Accepted Answer

A)  5.30 g.LS1U1P1-1 S1S1P0 
B)  0.392 g.LS1U1P1-1 S1S1P0 
C)  39.7 g.LS1U1P1-1 S1S1P0 
D)  79.5 g.LS1U1P1-1 S1S1P0 
E)  19.9 g.LS1U1P1-1 S1S1P0 
A)  5.30 g.LS1U1P1-1 S1S1P0 
B)  0.392 g.LS1U1P1-1 S1S1P0 
C)  39.7 g.LS1U1P1-1 S1S1P0 
D)  79.5 g.LS1U1P1-1 S1S1P0 
E)  19.9 g.LS1U1P1-1 S1S1P0

Question 19

An oxygen tank kept at 20$\omicron $C contains 28.0 moles of oxygen and the gauge reads 31.0 atm .After two weeks,The gauge reads 10.5 atm .How many moles of oxygen were used during the two-week period?

Accepted Answer

A)  9.25 moles 
B)  7.5 moles 
C)  20.5 moles 
D)  18.5 moles 
E)  9.48 moles 
A)  9.25 moles 
B)  7.5 moles 
C)  20.5 moles 
D)  18.5 moles 
E)  9.48 moles

Question 20

What improves the corrosion resistance of brass?

Accepted Answer

A)  Antimony. 
B)  Arsenic. 
C)  Tin. 
D)  None of the above. 
E)  All of the above. 
A)  Antimony. 
B)  Arsenic. 
C)  Tin. 
D)  None of the above. 
E)  All of the above.

What contaminant causes the red "terra cotta" color in most ceramics?

What elements are the major components of almost all glass?

Which statement about a semi-conductor is correct?

An amorphous solid is one in which the atoms, ions,or molecules lie in a random jumble with no order.

Ferrofluids contain suspensions of coarsely divided elemental iron.

The ability of a semi-conductor to carry an electric current can be enhanced by adding electrons to the conduction band.

How is lithography used to create a nano-material?

The atomic radius of aluminum is 143 pm .Estimate its density,Given that the metal has a close-packed structure.

If the average speed of a water molecule at 25^$\omicron$C is 640 m.s^-¹, what is the average speed at 100^$\circ$C?

Which of the following has the highest molar enthalpy of vaporization?

All the following are units of surface tension except

Order the following cubic unit cells from highest percentage of empty space to lowest:Body-centered,Primitive,Face-centered.

What mass of zinc metal is required to produce 12.0 L of hydrogen gas at exactly 0°C and 2.00 atm by reaction of the metal with excess strong acid?

Lithium metal reacts with nitrogen gas to produce lithium nitride . What volume of nitrogen gas at 2.00 atm and 175^$\omicron$C is required to produce 75.0 g of lithium nitride?

How is boron nitride formed?

Molecular solids are held together by weak intermolecular forces.

What is the density of xenon gas at 750 kPa and 25^$\circ$C?

An oxygen tank kept at 20^$\omicron$C contains 28.0 moles of oxygen and the gauge reads 31.0 atm .After two weeks,The gauge reads 10.5 atm .How many moles of oxygen were used during the two-week period?

What improves the corrosion resistance of brass?

Atoms

Molecules

Thermodynamics

Equilibrium

Reactions

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

Exam 3: States of Matter

What contaminant causes the red "terra cotta" color in most ceramics?

What elements are the major components of almost all glass?

Which statement about a semi-conductor is correct?

An amorphous solid is one in which the atoms, ions,or molecules lie in a random jumble with no order.

Ferrofluids contain suspensions of coarsely divided elemental iron.

The ability of a semi-conductor to carry an electric current can be enhanced by adding electrons to the conduction band.

How is lithography used to create a nano-material?

The atomic radius of aluminum is 143 pm .Estimate its density,Given that the metal has a close-packed structure.

If the average speed of a water molecule at 25 ο\omicron ο C is 640 m.s-1, what is the average speed at 100 ∘\circ∘ C?

Which of the following has the highest molar enthalpy of vaporization?

All the following are units of surface tension except

Order the following cubic unit cells from highest percentage of empty space to lowest:Body-centered,Primitive,Face-centered.

What mass of zinc metal is required to produce 12.0 L of hydrogen gas at exactly 0°C and 2.00 atm by reaction of the metal with excess strong acid?

Lithium metal reacts with nitrogen gas to produce lithium nitride . What volume of nitrogen gas at 2.00 atm and 175 ο\omicron ο C is required to produce 75.0 g of lithium nitride?

How is boron nitride formed?

Molecular solids are held together by weak intermolecular forces.

What is the density of xenon gas at 750 kPa and 25 ∘\circ∘ C?

An oxygen tank kept at 20 ο\omicron ο C contains 28.0 moles of oxygen and the gauge reads 31.0 atm .After two weeks,The gauge reads 10.5 atm .How many moles of oxygen were used during the two-week period?

What improves the corrosion resistance of brass?

Atoms

Molecules

Thermodynamics

Equilibrium

Reactions

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

If the average speed of a water molecule at 25^$\omicron$C is 640 m.s^-¹, what is the average speed at 100^$\circ$C?

Lithium metal reacts with nitrogen gas to produce lithium nitride . What volume of nitrogen gas at 2.00 atm and 175^$\omicron$C is required to produce 75.0 g of lithium nitride?

What is the density of xenon gas at 750 kPa and 25^$\circ$C?

An oxygen tank kept at 20^$\omicron$C contains 28.0 moles of oxygen and the gauge reads 31.0 atm .After two weeks,The gauge reads 10.5 atm .How many moles of oxygen were used during the two-week period?