Question 1

A steel bottle contains argon gas at STP.What is the final pressure if the temperature is changed to 145°C?

Accepted Answer

A)  0. 653 atm 
B)  0. 713 atm 
C)  1. 40 atm 
D)  1. 53 atm 
A)  0. 653 atm 
B)  0. 713 atm 
C)  1. 40 atm 
D)  1. 53 atm

Question 2

What volume of water is produced when 38.5 g of ethanol reacts with oxygen at 500°C at 1.75 atm?
CH3CH2OH(g)+ 3 O2(g)→ 2 CO2(g)+ 3 H2O(g)

Accepted Answer

A)  91.0 L 
B)  58.7 L 
C)  103 L 
D)  30.3 L 
E)  12.5 L 
A)  91.0 L 
B)  58.7 L 
C)  103 L 
D)  30.3 L 
E)  12.5 L

Question 3

What is the Celsius temperature of 100.0 g of chlorine gas in a 55.0-L container at 800 mm Hg?

Accepted Answer

A)  -23°C 
B)  228°C 
C)  250°C 
D)  500°C 
A)  -23°C 
B)  228°C 
C)  250°C 
D)  500°C

Question 4

How many liters of oxygen gas can be produced at STP from the decomposition of 0.250 L of 3.00 M H2O2 in the reaction according to the chemical equation shown below?

Accepted Answer

A)  8.41 L 
B)  11.2 L 
C)  16.8 L 
D)  33.6 L 
A)  8.41 L 
B)  11.2 L 
C)  16.8 L 
D)  33.6 L

Question 5

Define vapor pressure.

Accepted Answer

A)  partial pressure of water in a liquid mixture 
B)  partial pressure of water in a gaseous mixture 
C)  condensation of water 
D)  water dissolved in a liquid 
E)  water molecules 
A)  partial pressure of water in a liquid mixture 
B)  partial pressure of water in a gaseous mixture 
C)  condensation of water 
D)  water dissolved in a liquid 
E)  water molecules

Question 6

The following reaction is used to generate hydrogen gas in the laboratory.If 243 mL of gas is collected at 25°C and has a total pressure of 745 mm Hg,what mass of hydrogen is produced? A possibly useful table of water vapor pressures is provided below.
Mg(s)+ 2 HCl(aq)→ MgCl2(aq)+ H2(g)T (°C)P (mm Hg)
20 17.55
25 23.78
30 31.86

Accepted Answer

A)  0.0196 g H2 
B)  0.0717 g H2 
C)  0.0190 g H2 
D)  0.0144 g H2 
E)  0.0449 g H2 
A)  0.0196 g H2 
B)  0.0717 g H2 
C)  0.0190 g H2 
D)  0.0144 g H2 
E)  0.0449 g H2

Question 7

A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm.What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?

Accepted Answer

A)  10.2 atm 
B)  9.83 atm 
C)  15.3 atm 
D)  6.53 atm 
E)  1.05 atm 
A)  10.2 atm 
B)  9.83 atm 
C)  15.3 atm 
D)  6.53 atm 
E)  1.05 atm

Question 8

A mixture of 0.220 moles CO,0.350 moles N2 and 0.640 moles Ne has a total pressure of 2.95 atm.What is the pressure of CO?

Accepted Answer

A)  1.86 atm 
B)  0.649 atm 
C)  0.536 atm 
D)  1.54 atm 
E)  0.955 atm 
A)  1.86 atm 
B)  0.649 atm 
C)  0.536 atm 
D)  1.54 atm 
E)  0.955 atm

Question 9

What is the volume of 9.783 × 1023 atoms of Kr at 9.25 atm and 512K?

Accepted Answer

A)  7.38 L 
B)  3.69 L 
C)  1.85 L 
D)  15.4 L 
E)  30.8 L 
A)  7.38 L 
B)  3.69 L 
C)  1.85 L 
D)  15.4 L 
E)  30.8 L

Question 10

A cylinder filled with nitrogen gas at 80°C occupies 6.82 L at 12.00 atm.It is then quickly cooled to 5°C,and the pressure is measured at 4.82 atm.What is the new volume of the cylinder?

Accepted Answer

A)  6.42 L 
B)  17.3 L 
C)  3.38 L 
D)  13.4 L 
A)  6.42 L 
B)  17.3 L 
C)  3.38 L 
D)  13.4 L

Question 11

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

Accepted Answer

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

Question 12

Consider a container of gas under a particular P,V,T set of conditions.Describe how the pressure would change if the volume were doubled while the absolute temperature was increasing by a factor of two.

Accepted Answer

The pressure would stay constant.The dou

Question 13

Which of the following samples has the greatest density at STP?

Accepted Answer

A)  NO2 
B)  Xe 
C)  SO2 
D)  SF6 
E)  All of these samples have the same density at STP. 
A)  NO2 
B)  Xe 
C)  SO2 
D)  SF6 
E)  All of these samples have the same density at STP.

Question 14

Why doesn't Dalton's Law of Partial Pressures depend on the identity of the gases present?

Accepted Answer

It is assumed that all gas particles are

Question 15

What is the density of hydrogen gas at STP?

Accepted Answer

A)  11.1 g/L 
B)  0.0450 g/L 
C)  0.0823 g/L 
D)  0.0899 g/L 
A)  11.1 g/L 
B)  0.0450 g/L 
C)  0.0823 g/L 
D)  0.0899 g/L

Question 16

Which of the following compounds will behave LEAST like an ideal gas at low temperatures?

Accepted Answer

A)  He 
B)  SO2 
C)  H2 
D)  N2 
E)  F2 
A)  He 
B)  SO2 
C)  H2 
D)  N2 
E)  F2

Question 17

A 7.82 L gas cylinder contains 28.6 g of O2 and 79.5 g of Xe at 70°C.What is the pressure exerted by the gas?

Accepted Answer

A)  1.10 atm 
B)  8.63 atm 
C)  6.92 atm 
D)  3.28 atm 
E)  5.41 atm 
A)  1.10 atm 
B)  8.63 atm 
C)  6.92 atm 
D)  3.28 atm 
E)  5.41 atm

Question 18

Calculate the root mean square velocity of nitrogen molecules at 25°C.

Accepted Answer

A)  729 m/s 
B)  515 m/s 
C)  149 m/s 
D)  297 m/s 
A)  729 m/s 
B)  515 m/s 
C)  149 m/s 
D)  297 m/s

Question 19

How many grams of Xe gas are present in a 21.00 L cylinder held at a pressure of 21.00 atm and 67.0°C?

Accepted Answer

A)  2074 g 
B)  514.7 g 
C)  7361 g 
D)  8043 g 
A)  2074 g 
B)  514.7 g 
C)  7361 g 
D)  8043 g

Question 20

The volume of a gas is proportional to number of moles of a gas is known as

Accepted Answer

A)  Avogadro's Law. 
B)  Ideal Gas Law. 
C)  Charles's Law. 
D)  Boyle's Law. 
E)  Dalton's Law. 
A)  Avogadro's Law. 
B)  Ideal Gas Law. 
C)  Charles's Law. 
D)  Boyle's Law. 
E)  Dalton's Law.

Exam 11: Gases

A steel bottle contains argon gas at STP.What is the final pressure if the temperature is changed to 145°C?

What volume of water is produced when 38.5 g of ethanol reacts with oxygen at 500°C at 1.75 atm? CH3CH2OH(g)+ 3 O2(g)→ 2 CO2(g)+ 3 H2O(g)

What is the Celsius temperature of 100.0 g of chlorine gas in a 55.0-L container at 800 mm Hg?

How many liters of oxygen gas can be produced at STP from the decomposition of 0.250 L of 3.00 M H2O2 in the reaction according to the chemical equation shown below?

Define vapor pressure.

A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm.What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?

A mixture of 0.220 moles CO,0.350 moles N2 and 0.640 moles Ne has a total pressure of 2.95 atm.What is the pressure of CO?

What is the volume of 9.783 × 1023 atoms of Kr at 9.25 atm and 512K?

A cylinder filled with nitrogen gas at 80°C occupies 6.82 L at 12.00 atm.It is then quickly cooled to 5°C,and the pressure is measured at 4.82 atm.What is the new volume of the cylinder?

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

Consider a container of gas under a particular P,V,T set of conditions.Describe how the pressure would change if the volume were doubled while the absolute temperature was increasing by a factor of two.

Which of the following samples has the greatest density at STP?

Why doesn't Dalton's Law of Partial Pressures depend on the identity of the gases present?

What is the density of hydrogen gas at STP?

Which of the following compounds will behave LEAST like an ideal gas at low temperatures?

A 7.82 L gas cylinder contains 28.6 g of O2 and 79.5 g of Xe at 70°C.What is the pressure exerted by the gas?

Calculate the root mean square velocity of nitrogen molecules at 25°C.

How many grams of Xe gas are present in a 21.00 L cylinder held at a pressure of 21.00 atm and 67.0°C?

The volume of a gas is proportional to number of moles of a gas is known as

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

What volume of water is produced when 38.5 g of ethanol reacts with oxygen at 500°C at 1.75 atm? CH₃CH₂OH(g)+ 3 O₂(g)→ 2 CO₂(g)+ 3 H₂O(g)

How many liters of oxygen gas can be produced at STP from the decomposition of 0.250 L of 3.00 M H₂O₂ in the reaction according to the chemical equation shown below?

A mixture of 0.220 moles CO,0.350 moles N₂ and 0.640 moles Ne has a total pressure of 2.95 atm.What is the pressure of CO?

What is the volume of 9.783 × 10²³ atoms of Kr at 9.25 atm and 512K?