Question 1

A gas of twice the molecular mass as CO2 will pass through a small hole how much faster than CO2?

Accepted Answer

A) 1/2 as fast 
B) 2 times as fast 
C)    as fast 
D) (1/   )as fast 
E) 4 times as fast 
A) 1/2 as fast 
B) 2 times as fast 
C)    as fast 
D) (1/   )as fast 
E) 4 times as fast

Question 2

The statement,"For a fixed mass of gas at constant temperature,gas volume is inversely proportional to gas pressure." is known as:

Accepted Answer

A) Avogadro's Law 
B) Boyle's Law 
C) Charle's Law 
D) Graham's Law 
E) Kelvin's Law 
A) Avogadro's Law 
B) Boyle's Law 
C) Charle's Law 
D) Graham's Law 
E) Kelvin's Law

Question 3

Chloroform (CHCl3)became popular as an anesthetic after Queen Victoria delivered her eighth child while anesthetized by chloroform in 1853.What is the density in grams per liter of chloroform at  
And 850 Torr?

Accepted Answer

A) 4.21 g/L 
B) 0.190 g/L 
C) 2.14 g/L 
D) 4.00 × 103 g/L 
E) 5.28 g/L 
A) 4.21 g/L 
B) 0.190 g/L 
C) 2.14 g/L 
D) 4.00 × 103 g/L 
E) 5.28 g/L

Question 4

A 5.00 L container of unknown gas at 25.0 °C has a pressure of 2.45 atm.The mass of the gas is 32.1 g.What gas is in the container?

Accepted Answer

A) Cl2 
B) F2 
C) NO2 
D) SO3 
E) SO2 
A) Cl2 
B) F2 
C) NO2 
D) SO3 
E) SO2

Question 5

What volume of acetylene gas,C2H2,would be required at 0 °C and 1 atm to obtain a 200.0 g C2H2 sample?

Accepted Answer

A) 4480 L 
B) 1.309 × 105 L 
C) 320.0 L 
D) 0.6304 L 
E) 172.1 L 
A) 4480 L 
B) 1.309 × 105 L 
C) 320.0 L 
D) 0.6304 L 
E) 172.1 L

Question 6

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains   Flask B contains O3,and flask C contains F2.Which flask contains the largest number of molecules?

Accepted Answer

A) flask A 
B) flask B 
C) flask C 
D) All contain the same number of molecules. 
A) flask A 
B) flask B 
C) flask C 
D) All contain the same number of molecules.

Question 7

The volume in L H2(g)(measured at 22 °C and 745 mmHg)required to react with 30.0 L CO(g)(measured at 0 °C and 760 mmHg)in the reaction 3 CO(g)+ 7 H2(g)→ C3H8(g)+ 3 H2O(l)is:

Accepted Answer

A) 63.5 L 
B) 74.1 L 
C) 77.2 L 
D) 70.0 L 
E) 33.1 L 
A) 63.5 L 
B) 74.1 L 
C) 77.2 L 
D) 70.0 L 
E) 33.1 L

Question 8

How many liters of gas is 10.8 grams of nitrogen at 780 mmHg and 38.0 °C?

Accepted Answer

A) 10.1 L 
B) 1.17 L 
C) 9.59 L 
D) 269 L 
E) 0.353 L 
A) 10.1 L 
B) 1.17 L 
C) 9.59 L 
D) 269 L 
E) 0.353 L

Question 9

Which of the following is a characteristic of an ideal gas?

Accepted Answer

A) The gas cannot be compressed infinitely. 
B) Inter-particle forces are prominent. 
C) Collisions between gas particles are perfectly elastic. 
D) Collisions between gas particles and container walls are not elastic. 
E) Individual gas particles occupy fixed volume. 
A) The gas cannot be compressed infinitely. 
B) Inter-particle forces are prominent. 
C) Collisions between gas particles are perfectly elastic. 
D) Collisions between gas particles and container walls are not elastic. 
E) Individual gas particles occupy fixed volume.

Question 10

Of the following values,the most likely to be observed for the volume of 1.00 mole of He(g)at 0 °C and 1000 atm is:

Accepted Answer

A) 17.4 mL 
B) 46 mL 
C) 22.4 mL 
D) 11.2 mL 
E) 22.4 L 
A) 17.4 mL 
B) 46 mL 
C) 22.4 mL 
D) 11.2 mL 
E) 22.4 L

Question 11

What is the temperature of NO2 gas if the average speed (actually the root mean square speed)of the molecules is 750 m s-1?

Accepted Answer

A) 1.38 K 
B) 1.04 × 103 K 
C) 1.38 × 103 K 
D) 1.04 × 106 K 
A) 1.38 K 
B) 1.04 × 103 K 
C) 1.38 × 103 K 
D) 1.04 × 106 K

Question 12

What volume of oxygen gas,at 533 °C and 750 Torr,could be produced by the decomposition of 38.1 g of potassium chlorate? The other product is potassium chloride.

Accepted Answer

A) 35.9 L 
B) 31.3 L 
C) 30.4 L 
D) 20.7 L 
E) 10.4 L 
A) 35.9 L 
B) 31.3 L 
C) 30.4 L 
D) 20.7 L 
E) 10.4 L

Question 13

Chloroform became popular as an anesthetic after Queen Victoria delivered her eighth child while anesthetized by chloroform in 1853.What is the molar mass of chloroform if 4.85 grams is 0.918 liters at 35 °C and 850 Torr?

Accepted Answer

A) 149 g/mol 
B) 119 g/mol 
C) 123 g/mol 
D) 134 g/mol 
E) 110 g/mol 
A) 149 g/mol 
B) 119 g/mol 
C) 123 g/mol 
D) 134 g/mol 
E) 110 g/mol

Question 14

To increase the volume of a fixed amount of gas from 100 cm3 to 200 cm3:

Accepted Answer

A) increase the temperature from 25.0 to 50.0 °C at constant pressure 
B) increase the pressure from 1.00 to 2.00 atm at constant temperature 
C) reduce the temperature from 400 K to 200 K at constant pressure 
D) reduce the pressure from 608 mmHg to 0.40 atm at constant temperature 
E) decrease the temperature from 600 K to 400 K 
A) increase the temperature from 25.0 to 50.0 °C at constant pressure 
B) increase the pressure from 1.00 to 2.00 atm at constant temperature 
C) reduce the temperature from 400 K to 200 K at constant pressure 
D) reduce the pressure from 608 mmHg to 0.40 atm at constant temperature 
E) decrease the temperature from 600 K to 400 K

Question 15

A 40.2 L constant-volume cylinder containing 2.21 mol He is heated until the pressure reaches 4.20 atm.What is the final temperature?

Accepted Answer

A) 258 K 
B) 658 K 
C) 931 K 
D) 804 K 
E) 1074 K 
A) 258 K 
B) 658 K 
C) 931 K 
D) 804 K 
E) 1074 K

Question 16

You have three cylinders containing O2 gas at the same volume and pressure.Cylinder A is at -15 °C,cylinder B is at -5 °F,cylinder C is at 255 K.Which cylinder contains the largest mass of oxygen?

Accepted Answer

A) cylinder A 
B) cylinder B 
C) cylinder C 
D) All cylinders contain the same mass of O2. 
A) cylinder A 
B) cylinder B 
C) cylinder C 
D) All cylinders contain the same mass of O2.

Question 17

What volume would be occupied by 4.8 g of oxygen gas at 0.50 atm and 133 °C?

Accepted Answer

A) 19 L 
B) 13 L 
C) 10 L 
D) 6.7 L 
E) 3.3 L 
A) 19 L 
B) 13 L 
C) 10 L 
D) 6.7 L 
E) 3.3 L

Question 18

Calculate the volume of H2(g)expressed at STP,required to react with 3.00 L of CO(g)at STP in the following reaction:
3 CO(g)+ 7 H2(g)→ C3H8(g)+ 3 H2O(l)

Accepted Answer

A) 3.00 L 
B) 7.00 L 
C) 10.0 L 
D) 22.4 L 
E) 1.00 L 
A) 3.00 L 
B) 7.00 L 
C) 10.0 L 
D) 22.4 L 
E) 1.00 L

Question 19

Diethyl ether was the first general anesthetic.It was first used in 1846 for surgical procedures.What is the molar mass of diethyl ether if 3.54 grams is 1.06 liters at 27 °C and 1.11 atm?

Accepted Answer

A) 74.1 g/mol 
B) 6.67 g/mol 
C) 103 g/mol 
D) 91.3 g/mol 
E) 84.7 g/mol 
A) 74.1 g/mol 
B) 6.67 g/mol 
C) 103 g/mol 
D) 91.3 g/mol 
E) 84.7 g/mol

Question 20

What is the effusion ratio of equal volumes of uranium-238 to uranium-235 at 4500 K?

Accepted Answer

A) 1.000 
B) 0.987 
C) 1.02 
D) 0.994 
E) 1.01 
A) 1.000 
B) 0.987 
C) 1.02 
D) 0.994 
E) 1.01

Exam 6: Gases

A gas of twice the molecular mass as CO2 will pass through a small hole how much faster than CO2?

The statement,"For a fixed mass of gas at constant temperature,gas volume is inversely proportional to gas pressure." is known as:

Chloroform (CHCl3)became popular as an anesthetic after Queen Victoria delivered her eighth child while anesthetized by chloroform in 1853.What is the density in grams per liter of chloroform at And 850 Torr?

A 5.00 L container of unknown gas at 25.0 °C has a pressure of 2.45 atm.The mass of the gas is 32.1 g.What gas is in the container?

What volume of acetylene gas,C2H2,would be required at 0 °C and 1 atm to obtain a 200.0 g C2H2 sample?

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains Flask B contains O3,and flask C contains F2.Which flask contains the largest number of molecules?

The volume in L H2(g)(measured at 22 °C and 745 mmHg)required to react with 30.0 L CO(g)(measured at 0 °C and 760 mmHg)in the reaction 3 CO(g)+ 7 H2(g)→ C3H8(g)+ 3 H2O(l)is:

How many liters of gas is 10.8 grams of nitrogen at 780 mmHg and 38.0 °C?

Which of the following is a characteristic of an ideal gas?

Of the following values,the most likely to be observed for the volume of 1.00 mole of He(g)at 0 °C and 1000 atm is:

What is the temperature of NO2 gas if the average speed (actually the root mean square speed)of the molecules is 750 m s-1?

What volume of oxygen gas,at 533 °C and 750 Torr,could be produced by the decomposition of 38.1 g of potassium chlorate? The other product is potassium chloride.

Chloroform became popular as an anesthetic after Queen Victoria delivered her eighth child while anesthetized by chloroform in 1853.What is the molar mass of chloroform if 4.85 grams is 0.918 liters at 35 °C and 850 Torr?

To increase the volume of a fixed amount of gas from 100 cm3 to 200 cm3:

A 40.2 L constant-volume cylinder containing 2.21 mol He is heated until the pressure reaches 4.20 atm.What is the final temperature?

You have three cylinders containing O2 gas at the same volume and pressure.Cylinder A is at -15 °C,cylinder B is at -5 °F,cylinder C is at 255 K.Which cylinder contains the largest mass of oxygen?

What volume would be occupied by 4.8 g of oxygen gas at 0.50 atm and 133 °C?

Calculate the volume of H2(g)expressed at STP,required to react with 3.00 L of CO(g)at STP in the following reaction: 3 CO(g)+ 7 H2(g)→ C3H8(g)+ 3 H2O(l)

Diethyl ether was the first general anesthetic.It was first used in 1846 for surgical procedures.What is the molar mass of diethyl ether if 3.54 grams is 1.06 liters at 27 °C and 1.11 atm?

What is the effusion ratio of equal volumes of uranium-238 to uranium-235 at 4500 K?

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

A gas of twice the molecular mass as CO₂ will pass through a small hole how much faster than CO₂?

Chloroform (CHCl₃)became popular as an anesthetic after Queen Victoria delivered her eighth child while anesthetized by chloroform in 1853.What is the density in grams per liter of chloroform at And 850 Torr?

What volume of acetylene gas,C₂H₂,would be required at 0 °C and 1 atm to obtain a 200.0 g C₂H₂ sample?

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains Flask B contains O₃,and flask C contains F₂.Which flask contains the largest number of molecules?

The volume in L H₂(g)(measured at 22 °C and 745 mmHg)required to react with 30.0 L CO(g)(measured at 0 °C and 760 mmHg)in the reaction 3 CO(g)+ 7 H₂(g)→ C₃H₈(g)+ 3 H₂O(l)is:

What is the temperature of NO₂ gas if the average speed (actually the root mean square speed)of the molecules is 750 m s^-1?

To increase the volume of a fixed amount of gas from 100 cm³ to 200 cm³:

You have three cylinders containing O₂ gas at the same volume and pressure.Cylinder A is at -15 °C,cylinder B is at -5 °F,cylinder C is at 255 K.Which cylinder contains the largest mass of oxygen?

Calculate the volume of H₂(g)expressed at STP,required to react with 3.00 L of CO(g)at STP in the following reaction: 3 CO(g)+ 7 H₂(g)→ C₃H₈(g)+ 3 H₂O(l)