Question 1

What is the average speed (actually the root mean square speed)of a neon atom at 27 °C?

Accepted Answer

A) 5.78 m s-1 
B) 19.3 m s-1 
C) 183 m s-1 
D) 609 m s-1 
A) 5.78 m s-1 
B) 19.3 m s-1 
C) 183 m s-1 
D) 609 m s-1

Question 2

The mole fraction of nitrous oxide in dry air near sea level is 1.818 ×  
,where the molar mass of nitrous oxide is 44.013.The concentration of nitrous oxide in the atmosphere is ________ ppm.

Accepted Answer

A) 2.0 × 1012 
B) 5.0 × 10-5 
C) 500 
D) 18.18 
E) 5.0 × 10-13 
A) 2.0 × 1012 
B) 5.0 × 10-5 
C) 500 
D) 18.18 
E) 5.0 × 10-13

Question 3

What is the volume,in L,occupied by a mixture of 16.0 g Ne(g)and 42.0 g Ar(g)at 15.0 atm pressure and 25 °C?

Accepted Answer

A) 94.6 L 
B) 3.01 L 
C) 1.71 L 
D) 1.29 L 
E) 0.252 L 
A) 94.6 L 
B) 3.01 L 
C) 1.71 L 
D) 1.29 L 
E) 0.252 L

Question 4

Convert 8.50 kg/cm2 to the equivalent pressure in atmospheres.

Accepted Answer

A) 8.78 atm 
B) 1.12 atm 
C) 9.53 atm 
D) 8.23 atm 
E) 7.47 atm 
A) 8.78 atm 
B) 1.12 atm 
C) 9.53 atm 
D) 8.23 atm 
E) 7.47 atm

Question 5

A sample of gas has a volume of 2.5 L at 30 °C and 720 mmHg.What will be the volume of this gas at 22 °C and 750 mmHg?

Accepted Answer

A) 1.8 L 
B) 3.3 L 
C) 2.7 L 
D) 2.3 L 
E) 2.5 L 
A) 1.8 L 
B) 3.3 L 
C) 2.7 L 
D) 2.3 L 
E) 2.5 L

Question 6

Liquid mercury freezes at a temperature of -39 °C.The freezing point of mercury on the Kelvin scale is ________.

Accepted Answer

A) 234 K 
B) 39 K 
C) 312 K 
D) 273 K 
E) -39 K 
A) 234 K 
B) 39 K 
C) 312 K 
D) 273 K 
E) -39 K

Question 7

A sample of oxygen gas is collected over water at 23 °C at a barometric pressure of 751 mmHg (the vapor pressure of water at 23 °C = 21 mmHg).The partial pressure of oxygen gas in the sample collected is ________.

Accepted Answer

A) 0.96 atm 
B) 21 mmHg 
C) 751 mmHg 
D) 1.02 atm 
E) 44 mmHg 
A) 0.96 atm 
B) 21 mmHg 
C) 751 mmHg 
D) 1.02 atm 
E) 44 mmHg

Question 8

Which of the following gases has the highest average speed at 400 K?

Accepted Answer

A) N2 
B) O2   
C) F2 
D) Cl2 
A) N2 
B) O2   
C) F2 
D) Cl2

Question 9

Butane (C4H10)is used as a fuel where natural gas is not available.How many grams of butane will fill a 45.0 liter container at 27 °C and 3.05 atm?

Accepted Answer

A) 26.6 g 
B) 3.60 × 103 g 
C) 5.58 g 
D) 10.4 g 
E) 324 g 
A) 26.6 g 
B) 3.60 × 103 g 
C) 5.58 g 
D) 10.4 g 
E) 324 g

Question 10

If someone were to light a cigar at one end of a closed room,persons at the other end of the room might soon perceive an odor due to gaseous emissions from the cigar.Such a phenomenon is an example of effusion.

Accepted Answer

A) True 
 B)False

Question 11

When 8.21 L of C3H8(g)is completely burned in oxygen,how many liters of oxygen are consumed? All gas volumes are measured at the same temperature and pressure but not at STP.

Accepted Answer

A) 57.5 L 
B) 41.1 L 
C) 1.17 L 
D) 1.64 L 
E) 23.7 L 
A) 57.5 L 
B) 41.1 L 
C) 1.17 L 
D) 1.64 L 
E) 23.7 L

Question 12

The volume of 350.mL of gas at 25 °C is decreased to 135 mL at constant pressure.What is the final temperature of the gas?

Accepted Answer

A) -158 °C 
B) 9.6 °C 
C) 65 °C 
D) 500 °C 
A) -158 °C 
B) 9.6 °C 
C) 65 °C 
D) 500 °C

Question 13

Convert 421 kPa to the equivalent pressure in atmospheres.

Accepted Answer

A) 4.27 × 105 atm 
B) 320 atm 
C) 0.554 atm 
D) 0.00415 atm 
E) 4.15 atm 
A) 4.27 × 105 atm 
B) 320 atm 
C) 0.554 atm 
D) 0.00415 atm 
E) 4.15 atm

What is the average speed (actually the root mean square speed)of a neon atom at 27 °C?

What is the volume,in L,occupied by a mixture of 16.0 g Ne(g)and 42.0 g Ar(g)at 15.0 atm pressure and 25 °C?

Convert 8.50 kg/cm²to the equivalent pressure in atmospheres.

A sample of gas has a volume of 2.5 L at 30 °C and 720 mmHg.What will be the volume of this gas at 22 °C and 750 mmHg?

Liquid mercury freezes at a temperature of -39 °C.The freezing point of mercury on the Kelvin scale is ________.

A sample of oxygen gas is collected over water at 23 °C at a barometric pressure of 751 mmHg (the vapor pressure of water at 23 °C = 21 mmHg).The partial pressure of oxygen gas in the sample collected is ________.

Which of the following gases has the highest average speed at 400 K?

Butane (C₄H₁₀)is used as a fuel where natural gas is not available.How many grams of butane will fill a 45.0 liter container at 27 °C and 3.05 atm?

If someone were to light a cigar at one end of a closed room,persons at the other end of the room might soon perceive an odor due to gaseous emissions from the cigar.Such a phenomenon is an example of effusion.

When 8.21 L of C₃H₈(g)is completely burned in oxygen,how many liters of oxygen are consumed? All gas volumes are measured at the same temperature and pressure but not at STP.

The volume of 350.mL of gas at 25 °C is decreased to 135 mL at constant pressure.What is the final temperature of the gas?

Convert 421 kPa to the equivalent pressure in atmospheres.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Exam 6: Gases

What is the average speed (actually the root mean square speed)of a neon atom at 27 °C?

The mole fraction of nitrous oxide in dry air near sea level is 1.818 × ,where the molar mass of nitrous oxide is 44.013.The concentration of nitrous oxide in the atmosphere is ________ ppm.

What is the volume,in L,occupied by a mixture of 16.0 g Ne(g)and 42.0 g Ar(g)at 15.0 atm pressure and 25 °C?

Convert 8.50 kg/cm2 to the equivalent pressure in atmospheres.

A sample of gas has a volume of 2.5 L at 30 °C and 720 mmHg.What will be the volume of this gas at 22 °C and 750 mmHg?

Liquid mercury freezes at a temperature of -39 °C.The freezing point of mercury on the Kelvin scale is ________.

A sample of oxygen gas is collected over water at 23 °C at a barometric pressure of 751 mmHg (the vapor pressure of water at 23 °C = 21 mmHg).The partial pressure of oxygen gas in the sample collected is ________.

Which of the following gases has the highest average speed at 400 K?

Butane (C4H10)is used as a fuel where natural gas is not available.How many grams of butane will fill a 45.0 liter container at 27 °C and 3.05 atm?

If someone were to light a cigar at one end of a closed room,persons at the other end of the room might soon perceive an odor due to gaseous emissions from the cigar.Such a phenomenon is an example of effusion.

When 8.21 L of C3H8(g)is completely burned in oxygen,how many liters of oxygen are consumed? All gas volumes are measured at the same temperature and pressure but not at STP.

The volume of 350.mL of gas at 25 °C is decreased to 135 mL at constant pressure.What is the final temperature of the gas?

Convert 421 kPa to the equivalent pressure in atmospheres.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Convert 8.50 kg/cm²to the equivalent pressure in atmospheres.

Butane (C₄H₁₀)is used as a fuel where natural gas is not available.How many grams of butane will fill a 45.0 liter container at 27 °C and 3.05 atm?

When 8.21 L of C₃H₈(g)is completely burned in oxygen,how many liters of oxygen are consumed? All gas volumes are measured at the same temperature and pressure but not at STP.