Question 1

A sample of gas has a volume of 200.mL at 20.0 ° C.What will be its volume at 40.0 °C, pressure remaining constant?

Accepted Answer

A) 18.8 mL 
B) 214 mL 
C) 100.mL 
D) 400.mL 
A) 18.8 mL 
B) 214 mL 
C) 100.mL 
D) 400.mL B

Question 2

A mixture containing 5.00 g of H2(g)and 10.0 g of O2(g)is allowed to react in a 15.0 L rigid container at a constant temperature of 25.0°C. 2H2(g)+ O2(g)   2H2O(l)
Once the reaction is complete,what will be the pressure of the excess gas inside the container?

Accepted Answer

A) 1.51 atm 
B) 4.04 atm 
C) 3.53 atm 
D) 3.02 atm 
A) 1.51 atm 
B) 4.04 atm 
C) 3.53 atm 
D) 3.02 atm D

Question 3

What is the molar mass of a gas if 16.0 L of the gas has a mass of 19.0 g at 765 torr and 20.0 °C?

Accepted Answer

A) 0.0352 g 
B) 28.4 g 
C) 26.8 g 
D) 1.94 g 
A) 0.0352 g 
B) 28.4 g 
C) 26.8 g 
D) 1.94 g B

Question 4

Which gas is most dense at STP?

Accepted Answer

A) Helium 
B) Nitrogen 
C) Oxygen 
D) Hydrogen 
A) Helium 
B) Nitrogen 
C) Oxygen 
D) Hydrogen

Question 5

Which of the following is not an assumption under KMT?

Accepted Answer

A) Gas particles have no attraction for one another. 
B) During a collision,energy is lost by the gas particles and later is regained. 
C) Gases at the same temperature have the same average kinetic energy. 
D) Gas particles move in straight lines in all directions. 
A) Gas particles have no attraction for one another. 
B) During a collision,energy is lost by the gas particles and later is regained. 
C) Gases at the same temperature have the same average kinetic energy. 
D) Gas particles move in straight lines in all directions.

Question 6

What is the volume of 0.132 moles of carbon dioxide gas at STP?

Accepted Answer

A) 2.96 L 
B) 5.81 L 
C) 170.L 
D) 333 L 
A) 2.96 L 
B) 5.81 L 
C) 170.L 
D) 333 L

Question 7

At STP,which sample contains twice the number of molecules found in 4.00 L of hydrogen gas?

Accepted Answer

A) 1.00 L of He 
B) 2.00 L of He 
C) 4.00 L of He 
D) 8.00 L of He 
A) 1.00 L of He 
B) 2.00 L of He 
C) 4.00 L of He 
D) 8.00 L of He

Question 8

What is the molar mass of a gas if 12.0 L of the gas at STP has a mass of 16.0 grams?

Accepted Answer

A) 8.57 g 
B) 22.4 g 
C) 16.8 g 
D) 29.9 g 
A) 8.57 g 
B) 22.4 g 
C) 16.8 g 
D) 29.9 g

Question 9

What mass of water is produced when 10.0 L of oxygen react completely in the following equation? 2 H2(g)+ O2(g)$\rarr$ 2 H2O(l)

Accepted Answer

A) 4.02 g 
B) 16.1 g 
C) 20.1 g 
D) 80.7 g 
A) 4.02 g 
B) 16.1 g 
C) 20.1 g 
D) 80.7 g

Question 10

When the following reaction took place at 23.8 °C and a pressure of 758 torr,3.90 L of O2(g)were collected.What mass of KClO3 decomposed? 2KClO3(s)   2KCl(s)+ 3O2(g)

Accepted Answer

A) 163 g 
B) 19.6 g 
C) 13.0 g 
D) 39.1 g 
A) 163 g 
B) 19.6 g 
C) 13.0 g 
D) 39.1 g

Question 11

How many moles of oxygen are consumed when 100.L of dinitrogen pentoxide are produced in the following equation?
 2 N2(g)+ 5 O2(g)$\rarr$ 2 N2O5(g)

Accepted Answer

A) 0.560 moles 
B) 1.79 moles 
C) 0.0896 moles 
D) 11.2 moles 
A) 0.560 moles 
B) 1.79 moles 
C) 0.0896 moles 
D) 11.2 moles

Question 12

Which gas would have the lowest velocity at 280 K?

Accepted Answer

A) Ar 
B) Ne 
C) H2 
D) CO 
A) Ar 
B) Ne 
C) H2 
D) CO

Question 13

What volume of ammonia is produced when 0.500 mole of nitrogen reacts completely in the following equation?
N2(g)+ 3 H2(g)$\rarr$2NH3(g)

Accepted Answer

A) 1.00 L 
B) 22.4 L 
C) 44.8 L 
D) 11.2 L 
A) 1.00 L 
B) 22.4 L 
C) 44.8 L 
D) 11.2 L

Question 14

Under which set of conditions will a real gas be least likely to act as an ideal gas?

Accepted Answer

A) High temperature and high pressure 
B) High temperature and low pressure 
C) Low temperature and high pressure 
D) Low temperature and low pressure 
A) High temperature and high pressure 
B) High temperature and low pressure 
C) Low temperature and high pressure 
D) Low temperature and low pressure

Question 15

The volume of one mole of any gas at STP is 22.4 L.

Accepted Answer

A) True 
 B)False

Question 16

The volume of a gas must always decrease when

Accepted Answer

A) temperature increases and pressure increases. 
B) temperature increases and pressure decreases. 
C) temperature decreases and pressure increases. 
D) temperature decreases and pressure decreases. 
A) temperature increases and pressure increases. 
B) temperature increases and pressure decreases. 
C) temperature decreases and pressure increases. 
D) temperature decreases and pressure decreases.

Question 17

What is the density of nitrogen gas at STP?

Accepted Answer

A) 0.625 g/L 
B) 0.799 g/L 
C) 1.60 g/L 
D) 1.25 g/L 
A) 0.625 g/L 
B) 0.799 g/L 
C) 1.60 g/L 
D) 1.25 g/L

Question 18

The volume of a gas,at constant temperature,is inversely proportional to its pressure.

Accepted Answer

A) True 
 B)False

Question 19

A mixture of gases consists of helium at a partial pressure of 400.torr,neon at a partial pressure of 300.torr,and argon at a partial pressure of 200.torr.What is the total pressure of this mixture of gases?

Accepted Answer

A) 300.torr 
B) 760.torr 
C) 900.torr 
D) 1000 torr 
A) 300.torr 
B) 760.torr 
C) 900.torr 
D) 1000 torr

Question 20

The rate of effusion of two gases is directly proportional to their molar masses.

Accepted Answer

A) True 
 B)False

A sample of gas has a volume of 200.mL at 20.0^°C.What will be its volume at 40.0^°C, pressure remaining constant?

A mixture containing 5.00 g of H₂(g)and 10.0 g of O₂(g)is allowed to react in a 15.0 L rigid container at a constant temperature of 25.0°C. 2H₂(g)+ O₂(g) 2H₂O(l) Once the reaction is complete,what will be the pressure of the excess gas inside the container?

What is the molar mass of a gas if 16.0 L of the gas has a mass of 19.0 g at 765 torr and 20.0^°C?

Which gas is most dense at STP?

Which of the following is not an assumption under KMT?

What is the volume of 0.132 moles of carbon dioxide gas at STP?

At STP,which sample contains twice the number of molecules found in 4.00 L of hydrogen gas?

What is the molar mass of a gas if 12.0 L of the gas at STP has a mass of 16.0 grams?

What mass of water is produced when 10.0 L of oxygen react completely in the following equation? 2 H₂(g)+ O₂(g) $\rarr$ 2 H₂O(l)

When the following reaction took place at 23.8 °C and a pressure of 758 torr,3.90 L of O₂(g)were collected.What mass of KClO₃ decomposed? 2KClO₃(s) 2KCl(s)+ 3O₂(g)

How many moles of oxygen are consumed when 100.L of dinitrogen pentoxide are produced in the following equation? 2 N₂(g)+ 5 O₂(g) $\rarr$ 2 N₂O₅(g)

Which gas would have the lowest velocity at 280 K?

What volume of ammonia is produced when 0.500 mole of nitrogen reacts completely in the following equation? N₂(g)+ 3 H₂(g) $\rarr$ 2NH₃(g)

Under which set of conditions will a real gas be least likely to act as an ideal gas?

The volume of one mole of any gas at STP is 22.4 L.

The volume of a gas must always decrease when

What is the density of nitrogen gas at STP?

The volume of a gas,at constant temperature,is inversely proportional to its pressure.

A mixture of gases consists of helium at a partial pressure of 400.torr,neon at a partial pressure of 300.torr,and argon at a partial pressure of 200.torr.What is the total pressure of this mixture of gases?

The rate of effusion of two gases is directly proportional to their molar masses.

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Acids, Bases, and Salts

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Exam 12: The Gaseous State of Matter

A sample of gas has a volume of 200.mL at 20.0 ° C.What will be its volume at 40.0 °C, pressure remaining constant?

A mixture containing 5.00 g of H2(g)and 10.0 g of O2(g)is allowed to react in a 15.0 L rigid container at a constant temperature of 25.0°C. 2H2(g)+ O2(g) 2H2O(l) Once the reaction is complete,what will be the pressure of the excess gas inside the container?

What is the molar mass of a gas if 16.0 L of the gas has a mass of 19.0 g at 765 torr and 20.0 °C?

Which gas is most dense at STP?

Which of the following is not an assumption under KMT?

What is the volume of 0.132 moles of carbon dioxide gas at STP?

At STP,which sample contains twice the number of molecules found in 4.00 L of hydrogen gas?

What is the molar mass of a gas if 12.0 L of the gas at STP has a mass of 16.0 grams?

What mass of water is produced when 10.0 L of oxygen react completely in the following equation? 2 H2(g)+ O2(g) →\rarr→ 2 H2O(l)

When the following reaction took place at 23.8 °C and a pressure of 758 torr,3.90 L of O2(g)were collected.What mass of KClO3 decomposed? 2KClO3(s) 2KCl(s)+ 3O2(g)

How many moles of oxygen are consumed when 100.L of dinitrogen pentoxide are produced in the following equation? 2 N2(g)+ 5 O2(g) →\rarr→ 2 N2O5(g)

Which gas would have the lowest velocity at 280 K?

What volume of ammonia is produced when 0.500 mole of nitrogen reacts completely in the following equation? N2(g)+ 3 H2(g) →\rarr→ 2NH3(g)

Under which set of conditions will a real gas be least likely to act as an ideal gas?

The volume of one mole of any gas at STP is 22.4 L.

The volume of a gas must always decrease when

What is the density of nitrogen gas at STP?

The volume of a gas,at constant temperature,is inversely proportional to its pressure.

A mixture of gases consists of helium at a partial pressure of 400.torr,neon at a partial pressure of 300.torr,and argon at a partial pressure of 200.torr.What is the total pressure of this mixture of gases?

The rate of effusion of two gases is directly proportional to their molar masses.

An Introduction to Chemistry

Standards for Measurement

Elements and Compounds

Properties of Matter

Early Atomic Theory and Structure

Nomenclature of Inorganic Compounds

Quantitative Composition of Compounds

Chemical Equations

Calculations From Chemical Equations

Modern Atomic Theory and the Periodic Table

Chemical Bonds: the Formation of Compounds From Atoms

Liquids

Solutions

Acids, Bases, and Salts

Chemical Equilibrium

Oxidationreduction

Nuclear Chemistry

Introduction to Organic Chemistry Online Only

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A sample of gas has a volume of 200.mL at 20.0^°C.What will be its volume at 40.0^°C, pressure remaining constant?

A mixture containing 5.00 g of H₂(g)and 10.0 g of O₂(g)is allowed to react in a 15.0 L rigid container at a constant temperature of 25.0°C. 2H₂(g)+ O₂(g) 2H₂O(l) Once the reaction is complete,what will be the pressure of the excess gas inside the container?

What is the molar mass of a gas if 16.0 L of the gas has a mass of 19.0 g at 765 torr and 20.0^°C?

What mass of water is produced when 10.0 L of oxygen react completely in the following equation? 2 H₂(g)+ O₂(g) $\rarr$ 2 H₂O(l)

When the following reaction took place at 23.8 °C and a pressure of 758 torr,3.90 L of O₂(g)were collected.What mass of KClO₃ decomposed? 2KClO₃(s) 2KCl(s)+ 3O₂(g)

How many moles of oxygen are consumed when 100.L of dinitrogen pentoxide are produced in the following equation? 2 N₂(g)+ 5 O₂(g) $\rarr$ 2 N₂O₅(g)

What volume of ammonia is produced when 0.500 mole of nitrogen reacts completely in the following equation? N₂(g)+ 3 H₂(g) $\rarr$ 2NH₃(g)