Question 1

If the average speed of a carbon dioxide molecule is 410 m.s-1  at 25S1U1P1$\circ$S1S1P0C,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  
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

Question 2

How many liters of hydrogen gas measured at 25.0S1U1P1$\circ$S1S1P0C 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 L 
A) 0.544 L 
B) 6.94 L 
C) 1.36 L 
D) 16.2 L

Question 3

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

Accepted Answer

A) Neon 
B) Ammonia 
C) Chlorine 
D) Water 
E) Helium 
A) Neon 
B) Ammonia 
C) Chlorine 
D) Water 
E) Helium

Question 4

Which of the following gases will have the largest root mean square speed at 100S1U1P1$\circ$S1S1P0C?

Accepted Answer

A) water 
B) argon 
C) methane 
D) nitrogen 
E) oxygen 
A) water 
B) argon 
C) methane 
D) nitrogen 
E) oxygen

Question 5

The number of molecules in 44.8 L of nitrogen at exactly 0S1U1P1$\circ$S1S1P0C and 3.00 atm is

Accepted Answer

A) 1.20 * 1024  
B) 3.61 * 1024  
C) 3.61 * 10-23  
D) 2.01 * 1023  
E) 18.0 * 10-23  
A) 1.20 * 1024  
B) 3.61 * 1024  
C) 3.61 * 10-23  
D) 2.01 * 1023  
E) 18.0 * 10-23

Question 6

What is the root mean square speed of carbon dioxide molecules at 98S1U1P1$\circ$S1S1P0C?

Accepted Answer

A) 153 m.s-1  
B) 459 m.s-1  
C) 45.6 m.s-1  
D) 574 m.s-1  
E) 236 m.s-1  
A) 153 m.s-1  
B) 459 m.s-1  
C) 45.6 m.s-1  
D) 574 m.s-1  
E) 236 m.s-1

Question 7

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

Accepted Answer

A) 2.42 g.L-1  
B) 1.21 g.L-1  
C) 0.605 g.L-1  
D) 0.161 g.L-1  
E) 0.0120 g.L-1  
A) 2.42 g.L-1  
B) 1.21 g.L-1  
C) 0.605 g.L-1  
D) 0.161 g.L-1  
E) 0.0120 g.L-1

Question 8

The pressure at 20,000 feet above sea level is about 400.mmHg.This corresponds to

Accepted Answer

A) 526 Pa 
B) 53.3 kg.m-1.s-2  
C) 0.526 Torr 
D) 0.526 kPa 
E) 53.3 kPa 
A) 526 Pa 
B) 53.3 kg.m-1.s-2  
C) 0.526 Torr 
D) 0.526 kPa 
E) 53.3 kPa

Question 9

Sulfur dioxide reacts with oxygen gas to produce sulfur trioxide.What volume of oxygen gas will react with 15.0 L of sulfur dioxide if both gases are at 101.3 kPa and 125S1U1P1$\circ$S1S1P0C?

Accepted Answer

A) 30.0 L 
B) 15.0 L 
C) 7.50 L 
D) 5.00 L 
E) 3.75 L 
A) 30.0 L 
B) 15.0 L 
C) 7.50 L 
D) 5.00 L 
E) 3.75 L

Question 10

Consider the following statements:
1.Real gases act more like ideal gases as the temperature increases.
2.When n and T are constant, a decrease in P results in a decrease in V.
3.At 1 atm and 273 K, every molecule in a sample of a gas has the same speed.
4.At constant T, CO2 molecules at 1 atm and H2 molecules at 5 atm have the same 
average kinetic energy.
Which of these statements is true?

Accepted Answer

A) 2 and 3 
B) 1 and 2 
C) 1 and 4 
D) 3 and 4 
E) 2 and 4 
A) 2 and 3 
B) 1 and 2 
C) 1 and 4 
D) 3 and 4 
E) 2 and 4

Question 11

What is the pressure of 800.g of nitrogen gas at 25.00°C at a volume of 5.0 L?

Accepted Answer

A) 2.35 Torr 
B) 11.7 Torr 
C) 391.4 Torr 
D) 140 Torr 
E) 699 Torr 
A) 2.35 Torr 
B) 11.7 Torr 
C) 391.4 Torr 
D) 140 Torr 
E) 699 Torr

Question 12

Consider two cylinders of gas,both with a volume of 25 L and at 1 atm and 25S1U1P1$\circ$S1S1P0C.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 13

Lithium metal reacts with nitrogen gas to produce lithium nitride.What volume of nitrogen gas at 2.00 atm and 175S1U1P1$\circ$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 14

A 0.479-g sample of nitrogen,oxygen or neon gas occupies a volume of 265 mL at 157 l Pa and 20.0S1U1P1$\circ$S1S1P0C.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  
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

Question 15

If 250.0 mL of a gas at STP weighs 2.00 g,what is the molar mass of the gas?

Accepted Answer

A) 28.0 g.mol-1  
B) 179 g.mol-1  
C) 8.00 g.mol-1  
D) 56.0 g.mol-1  
E) 44.8 g.mol-1  
A) 28.0 g.mol-1  
B) 179 g.mol-1  
C) 8.00 g.mol-1  
D) 56.0 g.mol-1  
E) 44.8 g.mol-1

Question 16

The density of citronellal,a mosquito repellant,is 1.45 g.L-1 at 365S1U1P1$\circ$S1S1P0C and 50.0 kPa.What is the molar mass of citronellal?

Accepted Answer

A) 73.2 g.mol-1  
B) 154 g.mol-1  
C) 95.7 g.mol-1  
D) 37.5 g.mol-1  
E) 88.0 g.mol-1  
A) 73.2 g.mol-1  
B) 154 g.mol-1  
C) 95.7 g.mol-1  
D) 37.5 g.mol-1  
E) 88.0 g.mol-1

Question 17

How many liters of nitrogen gas measured at 25.0S1U1P1$\circ$S1S1P0C and 745 Torr are produced by detonation of 90.8 g of TNT,trinitrotoluene,C7H5(NO2)3?

Accepted Answer

A) 0.839 L 
B) 1.26 L 
C) 9.98 L 
D) 15.0 L 
A) 0.839 L 
B) 1.26 L 
C) 9.98 L 
D) 15.0 L

Question 18

A pressure of 2.50 * 105 kg.m-1.s-2 corresponds to

Accepted Answer

A) 1.00 atm 
B) 760 mmHg 
C) 253 kPa 
D) 2.50 * 105 Torr 
E) 2.50 Pa 
A) 1.00 atm 
B) 760 mmHg 
C) 253 kPa 
D) 2.50 * 105 Torr 
E) 2.50 Pa

Question 19

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

Question 20

Which molecules of the following gases will have the greatest average kinetic energy?

Accepted Answer

A) CO2 at 1 atm and 298 K 
B) N2 at 1 atm and 298 K 
C) All the molecules have the same kinetic energy. 
D) He at 0.1 atm and 298 K 
E) H2 at 0.5 atm and 298 K 
A) CO2 at 1 atm and 298 K 
B) N2 at 1 atm and 298 K 
C) All the molecules have the same kinetic energy. 
D) He at 0.1 atm and 298 K 
E) H2 at 0.5 atm and 298 K

If the average speed of a carbon dioxide molecule is 410 m.s^-1 at 25^$\circ$C,what is the average speed of a molecule of methane at the same temperature?

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

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

Which of the following gases will have the largest root mean square speed at 100^$\circ$C?

The number of molecules in 44.8 L of nitrogen at exactly 0^$\circ$C and 3.00 atm is

What is the root mean square speed of carbon dioxide molecules at 98^$\circ$C?

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

The pressure at 20,000 feet above sea level is about 400.mmHg.This corresponds to

Sulfur dioxide reacts with oxygen gas to produce sulfur trioxide.What volume of oxygen gas will react with 15.0 L of sulfur dioxide if both gases are at 101.3 kPa and 125^$\circ$C?

What is the pressure of 800.g of nitrogen gas at 25.00°C at a volume of 5.0 L?

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

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

If 250.0 mL of a gas at STP weighs 2.00 g,what is the molar mass of the gas?

The density of citronellal,a mosquito repellant,is 1.45 g.L^-¹ at 365^$\circ$C and 50.0 kPa.What is the molar mass of citronellal?

How many liters of nitrogen gas measured at 25.0^$\circ$C and 745 Torr are produced by detonation of 90.8 g of TNT,trinitrotoluene,C₇H₅(NO₂)₃?

A pressure of 2.50 * 10⁵ kg.m^-¹.s^-² corresponds to

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?

Which molecules of the following gases will have the greatest average kinetic energy?

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Exam 5: The Properties of Gases

If the average speed of a carbon dioxide molecule is 410 m.s-1 at 25 ∘\circ∘ C,what is the average speed of a molecule of methane at the same temperature?

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

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

Which of the following gases will have the largest root mean square speed at 100 ∘\circ∘ C?

The number of molecules in 44.8 L of nitrogen at exactly 0 ∘\circ∘ C and 3.00 atm is

What is the root mean square speed of carbon dioxide molecules at 98 ∘\circ∘ C?

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

The pressure at 20,000 feet above sea level is about 400.mmHg.This corresponds to

Sulfur dioxide reacts with oxygen gas to produce sulfur trioxide.What volume of oxygen gas will react with 15.0 L of sulfur dioxide if both gases are at 101.3 kPa and 125 ∘\circ∘ C?

What is the pressure of 800.g of nitrogen gas at 25.00°C at a volume of 5.0 L?

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

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

If 250.0 mL of a gas at STP weighs 2.00 g,what is the molar mass of the gas?

The density of citronellal,a mosquito repellant,is 1.45 g.L-1 at 365 ∘\circ∘ C and 50.0 kPa.What is the molar mass of citronellal?

How many liters of nitrogen gas measured at 25.0 ∘\circ∘ C and 745 Torr are produced by detonation of 90.8 g of TNT,trinitrotoluene,C7H5(NO2)3?

A pressure of 2.50 * 105 kg.m-1.s-2 corresponds to

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?

Which molecules of the following gases will have the greatest average kinetic energy?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

Liquids and Solids

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

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If the average speed of a carbon dioxide molecule is 410 m.s^-1 at 25^$\circ$C,what is the average speed of a molecule of methane at the same temperature?

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

Which of the following gases will have the largest root mean square speed at 100^$\circ$C?

The number of molecules in 44.8 L of nitrogen at exactly 0^$\circ$C and 3.00 atm is

What is the root mean square speed of carbon dioxide molecules at 98^$\circ$C?

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

Sulfur dioxide reacts with oxygen gas to produce sulfur trioxide.What volume of oxygen gas will react with 15.0 L of sulfur dioxide if both gases are at 101.3 kPa and 125^$\circ$C?

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

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

The density of citronellal,a mosquito repellant,is 1.45 g.L^-¹ at 365^$\circ$C and 50.0 kPa.What is the molar mass of citronellal?

How many liters of nitrogen gas measured at 25.0^$\circ$C and 745 Torr are produced by detonation of 90.8 g of TNT,trinitrotoluene,C₇H₅(NO₂)₃?

A pressure of 2.50 * 10⁵ kg.m^-¹.s^-² corresponds to

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?