Question 1

A particular gas exerts a pressure of 731 mmHg.What is this pressure in units of atmospheres?

Accepted Answer

A) 5.48 × 105 atm 
B) 5.63 × 105 atm 
C) 721 atm 
D) 0.974 atm 
E) 0.961 atm 
A) 5.48 × 105 atm 
B) 5.63 × 105 atm 
C) 721 atm 
D) 0.974 atm 
E) 0.961 atm

Question 2

A fixed amount of gas in a rigid container is heated from 100°C to 600°C.Which of the following responses best describes what will happen to the pressure of the gas?

Accepted Answer

A) The pressure will increase by a factor greater than 6. 
B) The pressure will increase by a factor of 6. 
C) The pressure will increase by a factor less than 6. 
D) The pressure will decrease by a factor of 6. 
E) The pressure will remain the same. 
A) The pressure will increase by a factor greater than 6. 
B) The pressure will increase by a factor of 6. 
C) The pressure will increase by a factor less than 6. 
D) The pressure will decrease by a factor of 6. 
E) The pressure will remain the same.

Question 3

If 250 mL of methane,CH4,effuses through a small hole in 20 s,the time required for the same volume of helium to pass through the hole under the same conditions will be

Accepted Answer

A) 40 s. 
B) 5 s. 
C) 1.3 s. 
D) 10 s. 
E) 80 s. 
A) 40 s. 
B) 5 s. 
C) 1.3 s. 
D) 10 s. 
E) 80 s.

Question 4

In a mixture of helium and chlorine,occupying a volume of 12.8 L at 605.6 mmHg and 21.6oC,it is found that the partial pressure of chlorine is 143 mmHg.What is the total mass of the sample?

Accepted Answer

A) 31.6 g 
B) 0.4 g 
C) 8.37 g 
D) 1.28 g 
E) 7.09 g 
A) 31.6 g 
B) 0.4 g 
C) 8.37 g 
D) 1.28 g 
E) 7.09 g

Question 5

What is the total volume of gases produced at 1092 K and 1.00 atm pressure when 320 g of ammonium nitrite undergoes the following decomposition reaction?
NH4NO2(s)→ N2(g)+ 2H2O(g)

Accepted Answer

A) 4 × 22.4 L 
B) 22.4 L 
C) 20 × 22.4 L 
D) 5 × 22.4 L 
E) 60 × 22.4 L 
A) 4 × 22.4 L 
B) 22.4 L 
C) 20 × 22.4 L 
D) 5 × 22.4 L 
E) 60 × 22.4 L

Question 6

A flexible vessel contains 43 L of gas where the pressure is 1.3 atm.What will the volume be when the pressure is 0.61 atm,the temperature remaining constant?

Accepted Answer

A) 0.011 L 
B) 20 L 
C) 43 L 
D) 0.044 L 
E) 92 L 
A) 0.011 L 
B) 20 L 
C) 43 L 
D) 0.044 L 
E) 92 L

Question 7

A flexible vessel contains 37 L of gas where the pressure is 1.0 atm.What will the volume be when the pressure is 0.70 atm,the temperature remaining constant?

Accepted Answer

A) 0.019 L 
B) 26 L 
C) 37 L 
D) 0.046 L 
E) 53 L 
A) 0.019 L 
B) 26 L 
C) 37 L 
D) 0.046 L 
E) 53 L

Question 8

Which statement is inconsistent with the kinetic theory of an ideal gas?

Accepted Answer

A) Most of the volume occupied by a gas is empty space. 
B) The forces of repulsion between gas molecules are very weak or negligible. 
C) Gas molecules move in a straight line between collisions. 
D) The average kinetic energy of a gas is proportional to the absolute temperature. 
E) The collisions between gas molecules are inelastic. 
A) Most of the volume occupied by a gas is empty space. 
B) The forces of repulsion between gas molecules are very weak or negligible. 
C) Gas molecules move in a straight line between collisions. 
D) The average kinetic energy of a gas is proportional to the absolute temperature. 
E) The collisions between gas molecules are inelastic.

Question 9

Which of the following gases has the greatest density at 2.5 atm and 25°C?

Accepted Answer

A) C4H8 
B) SO2 
C) N2O 
D) O2 
E) NF3 
A) C4H8 
B) SO2 
C) N2O 
D) O2 
E) NF3

Question 10

Equal volumes of propane,C3H8,and carbon monoxide,CO,at the same temperature and pressure have the same

Accepted Answer

A) chemical properties. 
B) number of atoms. 
C) average molecular speed. 
D) density. 
E) number of molecules. 
A) chemical properties. 
B) number of atoms. 
C) average molecular speed. 
D) density. 
E) number of molecules.

Question 11

What volume of sulfur trioxide gas,SO3,has the same number of atoms as 4 L of helium gas at the same temperature and pressure?

Accepted Answer

A) 20 L 
B) 0.8 L 
C) 4 L 
D) 1 L 
E) 16 L 
A) 20 L 
B) 0.8 L 
C) 4 L 
D) 1 L 
E) 16 L

Question 12

The pressure of a certain gas is measured to be 264.6 mmHg.What is this pressure expressed in units of pascals?​

Accepted Answer

A) ​3.436 × 10-6 Pa 
B) ​2.91 × 105 Pa 
C) ​2.835 × 10-5 Pa 
D) ​2.681 × 107 Pa 
E) ​3.528 × 104 Pa 
A) ​3.436 × 10-6 Pa 
B) ​2.91 × 105 Pa 
C) ​2.835 × 10-5 Pa 
D) ​2.681 × 107 Pa 
E) ​3.528 × 104 Pa

Question 13

Which of the following statements,concerning equal volumes of the gases dinitrogen monoxide,N2O,and propane,C3H8,at the same temperature and pressure,is not correct?

Accepted Answer

A) The moles of N2O and C3H8 are equal. 
B) They have the same density. 
C) They have the same number of molecules. 
D) They have the same number of atoms. 
E) They have the same absolute temperature. 
A) The moles of N2O and C3H8 are equal. 
B) They have the same density. 
C) They have the same number of molecules. 
D) They have the same number of atoms. 
E) They have the same absolute temperature.

Question 14

How is kinetic energy (Ek)related to the mass of a body (m)and its speed (v)?

Accepted Answer

A) ​Ek = (m * v2)/ 2 
B) ​Ek = m * v 
C) ​Ek = 2m / v 
D) ​Ek = (m2)/ v 
E) ​Ek = m + v 
A) ​Ek = (m * v2)/ 2 
B) ​Ek = m * v 
C) ​Ek = 2m / v 
D) ​Ek = (m2)/ v 
E) ​Ek = m + v

Question 15

The pressure of 6.2 L of nitrogen gas in a flexible container is decreased to one-half its original pressure,and its absolute temperature is increased to double the original temperature.The volume is now

Accepted Answer

A) 3.1 L. 
B) 6.2 L. 
C) 12 L. 
D) 25 L. 
E) 1.6 L. 
A) 3.1 L. 
B) 6.2 L. 
C) 12 L. 
D) 25 L. 
E) 1.6 L.

Question 16

The density of ethane,C2H6 (30.1 g/mol),at 25°C and 1.13 atm pressure is

Accepted Answer

A) 1.39 g/L. 
B) 16.6 g/L. 
C) 1.34 g/L. 
D) 0.719 g/L. 
E) 0.136 g/L. 
A) 1.39 g/L. 
B) 16.6 g/L. 
C) 1.34 g/L. 
D) 0.719 g/L. 
E) 0.136 g/L.

Question 17

Which of the following statements concerning a sample of oxygen gas at 1.00 atm pressure is incorrect?

Accepted Answer

A) The molecules are in constant rapid random motion. 
B) The pressure exerted by gaseous oxygen is due to the impact of the molecules with the walls of the container. 
C) The average kinetic energy of the gaseous oxygen is inversely proportional to the absolute temperature of the gas. 
D) The volume occupied by the oxygen molecules is negligible compared with the size of the container. 
E) Collisions between the gaseous molecules are elastic. 
A) The molecules are in constant rapid random motion. 
B) The pressure exerted by gaseous oxygen is due to the impact of the molecules with the walls of the container. 
C) The average kinetic energy of the gaseous oxygen is inversely proportional to the absolute temperature of the gas. 
D) The volume occupied by the oxygen molecules is negligible compared with the size of the container. 
E) Collisions between the gaseous molecules are elastic.

Question 18

How many moles of gas are in a gas sample occupying 0.816 L at 127 mmHg and 22°C?

Accepted Answer

A) 178 mol 
B) 4.28 mol 
C) 57.4 mol 
D) 0.00563 mol 
E) 0.000462 mol 
A) 178 mol 
B) 4.28 mol 
C) 57.4 mol 
D) 0.00563 mol 
E) 0.000462 mol

Question 19

A particular gas exerts a pressure of 689 mmHg.What is this pressure in units of bar?

Accepted Answer

A) 5.17 × 105 bar 
B) 5.31 × 105 bar 
C) 698 bar 
D) 0.894 bar 
E) 0.918 bar 
A) 5.17 × 105 bar 
B) 5.31 × 105 bar 
C) 698 bar 
D) 0.894 bar 
E) 0.918 bar

Question 20

Which of the following statements is least likely to be true of a sample of nitrogen gas at STP?

Accepted Answer

A) Collisions between the gaseous molecules are elastic. 
B) The intermolecular forces between nitrogen molecules are not negligible. 
C) Molecules of gaseous nitrogen are in constant random motion. 
D) The average kinetic energy of the gaseous nitrogen is proportional to the absolute temperature of the gas. 
E) The pressure exerted by gaseous nitrogen is due to collisions of the molecules with the walls of the container. 
A) Collisions between the gaseous molecules are elastic. 
B) The intermolecular forces between nitrogen molecules are not negligible. 
C) Molecules of gaseous nitrogen are in constant random motion. 
D) The average kinetic energy of the gaseous nitrogen is proportional to the absolute temperature of the gas. 
E) The pressure exerted by gaseous nitrogen is due to collisions of the molecules with the walls of the container.

Exam 5: The Gaseous State

A particular gas exerts a pressure of 731 mmHg.What is this pressure in units of atmospheres?

A fixed amount of gas in a rigid container is heated from 100°C to 600°C.Which of the following responses best describes what will happen to the pressure of the gas?

If 250 mL of methane,CH4,effuses through a small hole in 20 s,the time required for the same volume of helium to pass through the hole under the same conditions will be

In a mixture of helium and chlorine,occupying a volume of 12.8 L at 605.6 mmHg and 21.6oC,it is found that the partial pressure of chlorine is 143 mmHg.What is the total mass of the sample?

What is the total volume of gases produced at 1092 K and 1.00 atm pressure when 320 g of ammonium nitrite undergoes the following decomposition reaction? NH4NO2(s)→ N2(g)+ 2H2O(g)

A flexible vessel contains 43 L of gas where the pressure is 1.3 atm.What will the volume be when the pressure is 0.61 atm,the temperature remaining constant?

A flexible vessel contains 37 L of gas where the pressure is 1.0 atm.What will the volume be when the pressure is 0.70 atm,the temperature remaining constant?

Which statement is inconsistent with the kinetic theory of an ideal gas?

Which of the following gases has the greatest density at 2.5 atm and 25°C?

Equal volumes of propane,C3H8,and carbon monoxide,CO,at the same temperature and pressure have the same

What volume of sulfur trioxide gas,SO3,has the same number of atoms as 4 L of helium gas at the same temperature and pressure?

The pressure of a certain gas is measured to be 264.6 mmHg.What is this pressure expressed in units of pascals?​

Which of the following statements,concerning equal volumes of the gases dinitrogen monoxide,N2O,and propane,C3H8,at the same temperature and pressure,is not correct?

How is kinetic energy (Ek)related to the mass of a body (m)and its speed (v)?

The pressure of 6.2 L of nitrogen gas in a flexible container is decreased to one-half its original pressure,and its absolute temperature is increased to double the original temperature.The volume is now

The density of ethane,C2H6 (30.1 g/mol),at 25°C and 1.13 atm pressure is

Which of the following statements concerning a sample of oxygen gas at 1.00 atm pressure is incorrect?

How many moles of gas are in a gas sample occupying 0.816 L at 127 mmHg and 22°C?

A particular gas exerts a pressure of 689 mmHg.What is this pressure in units of bar?

Which of the following statements is least likely to be true of a sample of nitrogen gas at STP?

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Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

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Solubility and Complex-Ion Equilibria

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If 250 mL of methane,CH₄,effuses through a small hole in 20 s,the time required for the same volume of helium to pass through the hole under the same conditions will be

In a mixture of helium and chlorine,occupying a volume of 12.8 L at 605.6 mmHg and 21.6^oC,it is found that the partial pressure of chlorine is 143 mmHg.What is the total mass of the sample?

What is the total volume of gases produced at 1092 K and 1.00 atm pressure when 320 g of ammonium nitrite undergoes the following decomposition reaction? NH₄NO₂(s)→ N₂(g)+ 2H₂O(g)

Equal volumes of propane,C₃H₈,and carbon monoxide,CO,at the same temperature and pressure have the same

What volume of sulfur trioxide gas,SO₃,has the same number of atoms as 4 L of helium gas at the same temperature and pressure?

The pressure of a certain gas is measured to be 264.6 mmHg.What is this pressure expressed in units of pascals?

Which of the following statements,concerning equal volumes of the gases dinitrogen monoxide,N₂O,and propane,C₃H₈,at the same temperature and pressure,is not correct?

How is kinetic energy (E_k)related to the mass of a body (m)and its speed (v)?

The density of ethane,C₂H₆ (30.1 g/mol),at 25°C and 1.13 atm pressure is