Question 1

A 1.00-L sample of C2H4(g) at 2.00 atm and 293 K is burned in 8.00 L of oxygen gas at the same temperature and pressure to form carbon dioxide and water.If the reaction goes to completion,what is the final volume of all gases at 2.00 atm and 293 K?

Accepted Answer

A)  5.33 L
B)  9.00 L
C)  8.00 L
D)  3.00 L
E)  5.00 LF) A) and C)
G) B) and C)

Question 2

The main composition of dry air at sea level is about 75.5% nitrogen,23.1% oxygen,and 1.3% argon.In a 1.00-g sample of dry air at 1.00 atm,calculate the partial pressure of argon gas.

Accepted Answer

9.6 F1F1F1...

Question 3

Consider both nitrogen and chlorine as ideal gases.
(a)What is the molar kinetic energy of nitrogen gas at 25F1F1F1S1F1F1F10C?
(b)At 25F1F1F1S1F1F1F10C,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 4

Which of the following gases effuses slowest?

Accepted Answer

A)  Fluorine
B)  Carbon dioxide
C)  Chlorine
D)  Carbon monoxide
E)  NitrogenF) All of the above
G) A) and E)

Question 5

Consider the following van der Waals coefficients:  Which of the following gases has the smallest attractive forces?

Accepted Answer

A)  Ammonia
B)  Hydrogen
C)  Neon
D)  Helium
E)  ChlorineF) B) and C)
G) C) and D)

Question 6

Calcium cyanamide reacts with H2O(g) at 150C and 1.00 atm pressure: CaNCN(s) + 3H2O(g)  CaCO3(s) + 2NH3(g) 
If 80.0 L of NH3(g) are produced,what volume of steam is required?

Accepted Answer

A)  40.0 L
B)  80.0 L
C)  26.7 L
D)  120. L
E)  240. LF) A) and B)
G) C) and E)

Question 7

What is the density of nitrogen gas at 740 Torr and 12C?

Accepted Answer

A)  0.637 gL1 
B)  1.17 gL1 
C)  1.27 gL1 
D)  2.55 gL1 
E)  9.56 gL1 F) A) and B)
G) B) and E)

Question 8

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 gF) A) and B)
G) All of the above

Question 9

How many liters of hydrogen gas measured at 25.0C and 745 Torr are produced by detonation of 59.0 g of TNT,trinitrotoluene,C7H5(NO2) 3?

Accepted Answer

A)  0.544 L
B)  6.94 L
C)  1.36 L
D)  16.2 LE) A) and C)
F) All of the above

Question 10

What volume is occupied by 1,000.g of fluorine gas at 10.00°C at a pressure of 735 Torr?

Accepted Answer

A)  22.3 L
B)  44.6 L
C)  621 L
D)  632 L
E)  4,690 LF) C) and D)
G) A) and B)

Question 11

Which gas is least dense at 1 atm and 25C?

Accepted Answer

A)  Hydrogen cyanide
B)  Hydrogen sulfide
C)  Carbon dioxide
D)  Nitrogen
E)  AmmoniaF) A) and C)
G) None of the above

Question 12

A Group 17 or Group 18 gas has a density of 2.92 gL1 at 1.00 atm and 25C.The gas is

Accepted Answer

A)  helium
B)  neon
C)  fluorine
D)  argon
E)  chlorineF) A) and E)
G) C) and D)

Question 13

All of the following elements are gases at room temperature and atmospheric pressure except

Accepted Answer

A)  Rn
B)  F
C)  Br
D)  N
E)  ClF) A) and B)
G) C) and D)

Question 14

If the average speed of a carbon dioxide molecule is 410 ms1 at 25C,what is the average speed of a molecule of methane at the same temperature?

Accepted Answer

A)  680 ms1 
B)  410 ms1 
C)  1130 ms1 
D)  1000 ms1 
E)  247 ms1 F) B) and D)
G) A) and E)

Question 15

Oxygen can be produced in the laboratory by the reaction: 2KClO3(s)  2KCl(s) + 3O2(g) 
How many moles of potassium chlorate are needed to produce 257 mL of oxygen,collected over water at 14C and 97.6 kPa? The vapor pressure of water at 14C is
1.60 kPa.

Accepted Answer

A)  6.89  103 
B)  7.00  103 
C)  7.12  103 
D)  2.06  103 
E)  1.55  103 F) None of the above
G) A) and D)

Question 16

A plot of the Maxwell distribution against speed for different molecules shows that

Accepted Answer

A)  heavy molecules have a higher average speed.
B)  light molecules have a very narrow range of speeds.
C)  heavy molecules have a wide range of speeds.
D)  light molecules have a lower average speed.
E)  heavy molecules travel with speeds close to their average values.F) B) and D)
G) A) and C)

Question 17

If it takes 15 s for a certain sample of neon to effuse through a porous barrier,it will take ________________________________ (15 s,greater than 15 s,less than 15 s)for the same amount of nitrogen gas to effuse through the barrier under the same conditions.

Accepted Answer

The answer of If it takes 15 s for a...

Question 18

Which of the following gases would you predict to have the largest value of the van der Waals coefficient b?

Accepted Answer

A)  C2F2Cl2 
B)  C2FCl5 
C)  C2F4 
D)  Cl2 
E)  F2F) A) and E)
G) B) and C)

Question 19

A sample of oxygen gas collected at 25°C and 745 Torr has a vapor pressure of less than
745 Torr.True or false?

Accepted Answer

A) True 
 B)False

Question 20

A sample of gas with a volume of 750 mL exerts a pressure of 98.0 kPa at 30C.What pressure will the sample exert when it is compressed to 250 mL and cooled to 25C?

Accepted Answer

A)  353 kPa
B)  241 kPa
C)  359 kPa
D)  39.9 kPa
E)  26.7 kPaF) C) and E)
G) B) and C)

Exam 5: The Properties of Gases

A sample of gas with a volume of 750 mL exerts a pressure of 98.0 kPa at 30C.What pressure will the sample exert when it is compressed to 250 mL and cooled to 25C?

Correct AnswerverifiedShow Answer

A Group 17 or Group 18 gas has a density of 2.92 gL1 at 1.00 atm and 25C.The gas is

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Calcium cyanamide reacts with H2O(g) at 150C and 1.00 atm pressure: CaNCN(s) + 3H2O(g)  CaCO3(s) + 2NH3(g) If 80.0 L of NH3(g) are produced,what volume of steam is required?

Correct AnswerverifiedShow Answer

Oxygen can be produced in the laboratory by the reaction: 2KClO3(s)  2KCl(s) + 3O2(g) How many moles of potassium chlorate are needed to produce 257 mL of oxygen,collected over water at 14C and 97.6 kPa? The vapor pressure of water at 14C is 1.60 kPa.

Correct AnswerverifiedShow Answer

A sample of oxygen gas collected at 25°C and 745 Torr has a vapor pressure of less than 745 Torr.True or false?

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What volume is occupied by 1,000.g of fluorine gas at 10.00°C at a pressure of 735 Torr?

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All of the following elements are gases at room temperature and atmospheric pressure except

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If it takes 15 s for a certain sample of neon to effuse through a porous barrier,it will take ________________________________ (15 s,greater than 15 s,less than 15 s)for the same amount of nitrogen gas to effuse through the barrier under the same conditions.

Correct AnswerverifiedShow Answer

How many liters of hydrogen gas measured at 25.0C and 745 Torr are produced by detonation of 59.0 g of TNT,trinitrotoluene,C7H5(NO2) 3?

Correct AnswerverifiedShow Answer

A 1.00-L sample of C2H4(g) at 2.00 atm and 293 K is burned in 8.00 L of oxygen gas at the same temperature and pressure to form carbon dioxide and water.If the reaction goes to completion,what is the final volume of all gases at 2.00 atm and 293 K?

Correct AnswerverifiedShow Answer

Which gas is least dense at 1 atm and 25C?

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The main composition of dry air at sea level is about 75.5% nitrogen,23.1% oxygen,and 1.3% argon.In a 1.00-g sample of dry air at 1.00 atm,calculate the partial pressure of argon gas.

Correct Answerverified9.6 F1F1F1...View AnswerShow Answer

Consider the following van der Waals coefficients: Which of the following gases has the smallest attractive forces?

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Which of the following gases effuses slowest?

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Consider both nitrogen and chlorine as ideal gases. (a)What is the molar kinetic energy of nitrogen gas at 25C? (b)At 25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

A plot of the Maxwell distribution against speed for different molecules shows that

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What is the density of nitrogen gas at 740 Torr and 12C?

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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?

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If the average speed of a carbon dioxide molecule is 410 ms1 at 25C,what is the average speed of a molecule of methane at the same temperature?

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Which of the following gases would you predict to have the largest value of the van der Waals coefficient b?

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A Group 17 or Group 18 gas has a density of 2.92 gL^¹ at 1.00 atm and 25C.The gas is

Correct Answer
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Calcium cyanamide reacts with H₂O(g) at 150C and 1.00 atm pressure: CaNCN(s) + 3H₂O(g)  CaCO₃(s) + 2NH₃(g) If 80.0 L of NH₃(g) are produced,what volume of steam is required?

Correct Answer
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Oxygen can be produced in the laboratory by the reaction: 2KClO₃(s)  2KCl(s) + 3O₂(g) How many moles of potassium chlorate are needed to produce 257 mL of oxygen,collected over water at 14C and 97.6 kPa? The vapor pressure of water at 14C is 1.60 kPa.

Correct Answer
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How many liters of hydrogen gas measured at 25.0C and 745 Torr are produced by detonation of 59.0 g of TNT,trinitrotoluene,C₇H₅(NO₂) ₃?

Correct Answer
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A 1.00-L sample of C₂H₄(g) at 2.00 atm and 293 K is burned in 8.00 L of oxygen gas at the same temperature and pressure to form carbon dioxide and water.If the reaction goes to completion,what is the final volume of all gases at 2.00 atm and 293 K?

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9.6 F1F1F1...
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(a)3.72 kJ...
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If the average speed of a carbon dioxide molecule is 410 ms^¹ at 25C,what is the average speed of a molecule of methane at the same temperature?

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Correct Answer
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