Question 1

To solve problems using Boyle's Law,which mathematical equation should be used?

Accepted Answer

A)    =   
B)      =     
C)    =   
D)      =     
E) none of the above 
A)    =   
B)      =     
C)    =   
D)      =     
E) none of the above

Question 2

One liter of a gas is in a sealed chamber containing a moveable piston.If the piston is moved so that the volume of the gas is compressed to a volume of one-half liter,what will happen to the pressure on the gas? (Assume the temperature is constant and no gas particles are lost.)

Accepted Answer

A) The pressure will remain the same. 
B) The pressure will be half of the original value. 
C) The pressure will be twice the original value. 
D) It would be impossible to move the piston since gases are not compressible. 
E) none of the above 
A) The pressure will remain the same. 
B) The pressure will be half of the original value. 
C) The pressure will be twice the original value. 
D) It would be impossible to move the piston since gases are not compressible. 
E) none of the above

Question 3

A 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C.If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr,what will be the new temperature of the gas (reported to three significant figures in °C)?

Accepted Answer

A) 35.2°C 
B) 335°C 
C) 62.4°C 
D) 215°C 
E) none of the above 
A) 35.2°C 
B) 335°C 
C) 62.4°C 
D) 215°C 
E) none of the above

Question 4

If the kelvin temperature of a gas is doubled,the volume is doubled provided that the pressure and the number of particles remains constant.

Accepted Answer

A) True 
 B)False

Question 5

As we climb a mountain to a higher altitude,we experience a pressure decrease.

Accepted Answer

A) True 
 B)False

Question 6

Gas density can be calculated by dividing the mass of gas by its volume.If you took a balloon of gas and then warmed the balloon in a sunny window,what can now be said about the density of the gas in the balloon?

Accepted Answer

A) The gas density will remain the same. 
B) The gas density will increase. 
C) The gas density will decrease. 
D) The density of gases is independent of temperature. 
E) none of the above 
A) The gas density will remain the same. 
B) The gas density will increase. 
C) The gas density will decrease. 
D) The density of gases is independent of temperature. 
E) none of the above

Question 7

Gases are a collection of particles in constant,unpredictable motion.

Accepted Answer

A) True 
 B)False

Question 8

Avogadro's Law is expressed as:

Accepted Answer

A) V is proportional to   
B) P is proportional to n 
C) n is proportional to   
D) V is proportional to n 
E) none of the above 
A) V is proportional to   
B) P is proportional to n 
C) n is proportional to   
D) V is proportional to n 
E) none of the above

Question 9

The expected order of density for matter is gases < liquids < solids.

Accepted Answer

A) True 
 B)False

Question 10

A gas may not behave ideally under conditions of low pressure or high temperature.

Accepted Answer

A) True 
 B)False

Question 11

A sample of helium gas initially at 37.0°C,785 torr and   was heated to 58.0°C while the volume expanded to   .What is the final pressure in atm?

Accepted Answer

A) 517 
B) 0.681 
C) 1.79 
D) 3.21 
E) none of the above 
A) 517 
B) 0.681 
C) 1.79 
D) 3.21 
E) none of the above

Question 12

If the initial pressure of a system was 1.00 atm and the volume was halved and the kelvin temperature was tripled,what is the final pressure?

Accepted Answer

A) 2.00 atm 
B) 0.667 atm 
C) 1.50 atm 
D) 6.00 atm 
E) not enough information 
A) 2.00 atm 
B) 0.667 atm 
C) 1.50 atm 
D) 6.00 atm 
E) not enough information

Question 13

The vapor pressure of water at 20.0°C is   .If the pressure of a gas collected over water was measured to be   .What is the pressure of the pure gas?

Accepted Answer

A) 0.0230 atm 
B) 0.619 atm 
C) 0.573 atm 
D) 0.596 atm 
E) none of the above 
A) 0.0230 atm 
B) 0.619 atm 
C) 0.573 atm 
D) 0.596 atm 
E) none of the above

Question 14

Straws work because sucking creates a pressure difference.

Accepted Answer

A) True 
 B)False

Question 15

Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C.The barometric pressure at the time was 742.5 mm Hg.What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg?

Accepted Answer

A) 742.5 mm Hg 
B) 718.7 mm Hg 
C) 766.3 mm Hg 
D) 760.0 mm Hg 
E) none of the above 
A) 742.5 mm Hg 
B) 718.7 mm Hg 
C) 766.3 mm Hg 
D) 760.0 mm Hg 
E) none of the above

Question 16

What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature was determined to be 255.0°C?

Accepted Answer

A) 480°C 
B) -41°C 
C) 232°C 
D) 207°C 
E) none of the above 
A) 480°C 
B) -41°C 
C) 232°C 
D) 207°C 
E) none of the above

Question 17

Suppose a chemical reaction generated a 50% nitrogen/50% oxygen (by volume)mixture of gas that had a total volume of 22.4 liters at STP.This gas sample is composed of:

Accepted Answer

A) 1 mole of nitrogen and 1 mole of oxygen. 
B) 0.5 mole of nitrogen and 0.5 mole of oxygen. 
C) 50 mole of nitrogen and 50 mole of oxygen. 
D) 28 mole of nitrogen and 32 mole of oxygen. 
E) none of the above 
A) 1 mole of nitrogen and 1 mole of oxygen. 
B) 0.5 mole of nitrogen and 0.5 mole of oxygen. 
C) 50 mole of nitrogen and 50 mole of oxygen. 
D) 28 mole of nitrogen and 32 mole of oxygen. 
E) none of the above

Question 18

For all gas law calculations,the temperature must be in kelvins.

Accepted Answer

A) True 
 B)False

Question 19

What is the equivalent pressure of 760 torr in units of mm Hg?

Accepted Answer

A) 760 
B) 1 
C) 14.7 
D) 29.92 
E) none of the above 
A) 760 
B) 1 
C) 14.7 
D) 29.92 
E) none of the above

Question 20

Dalton's law of partial pressure is: P =   .

Accepted Answer

A) True 
 B)False

To solve problems using Boyle's Law,which mathematical equation should be used?

One liter of a gas is in a sealed chamber containing a moveable piston.If the piston is moved so that the volume of the gas is compressed to a volume of one-half liter,what will happen to the pressure on the gas? (Assume the temperature is constant and no gas particles are lost.)

A 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C.If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr,what will be the new temperature of the gas (reported to three significant figures in °C)?

If the kelvin temperature of a gas is doubled,the volume is doubled provided that the pressure and the number of particles remains constant.

As we climb a mountain to a higher altitude,we experience a pressure decrease.

Gas density can be calculated by dividing the mass of gas by its volume.If you took a balloon of gas and then warmed the balloon in a sunny window,what can now be said about the density of the gas in the balloon?

Gases are a collection of particles in constant,unpredictable motion.

Avogadro's Law is expressed as:

The expected order of density for matter is gases < liquids < solids.

A gas may not behave ideally under conditions of low pressure or high temperature.

A sample of helium gas initially at 37.0°C,785 torr and was heated to 58.0°C while the volume expanded to .What is the final pressure in atm?

If the initial pressure of a system was 1.00 atm and the volume was halved and the kelvin temperature was tripled,what is the final pressure?

The vapor pressure of water at 20.0°C is .If the pressure of a gas collected over water was measured to be .What is the pressure of the pure gas?

Straws work because sucking creates a pressure difference.

Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C.The barometric pressure at the time was 742.5 mm Hg.What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg?

What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature was determined to be 255.0°C?

Suppose a chemical reaction generated a 50% nitrogen/50% oxygen (by volume)mixture of gas that had a total volume of 22.4 liters at STP.This gas sample is composed of:

For all gas law calculations,the temperature must be in kelvins.

What is the equivalent pressure of 760 torr in units of mm Hg?

Dalton's law of partial pressure is: P = .

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Exam 11: Gases

To solve problems using Boyle's Law,which mathematical equation should be used?

One liter of a gas is in a sealed chamber containing a moveable piston.If the piston is moved so that the volume of the gas is compressed to a volume of one-half liter,what will happen to the pressure on the gas? (Assume the temperature is constant and no gas particles are lost.)

A 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C.If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr,what will be the new temperature of the gas (reported to three significant figures in °C)?

If the kelvin temperature of a gas is doubled,the volume is doubled provided that the pressure and the number of particles remains constant.

As we climb a mountain to a higher altitude,we experience a pressure decrease.

Gas density can be calculated by dividing the mass of gas by its volume.If you took a balloon of gas and then warmed the balloon in a sunny window,what can now be said about the density of the gas in the balloon?

Gases are a collection of particles in constant,unpredictable motion.

Avogadro's Law is expressed as:

The expected order of density for matter is gases < liquids < solids.

A gas may not behave ideally under conditions of low pressure or high temperature.

A sample of helium gas initially at 37.0°C,785 torr and was heated to 58.0°C while the volume expanded to .What is the final pressure in atm?

If the initial pressure of a system was 1.00 atm and the volume was halved and the kelvin temperature was tripled,what is the final pressure?

The vapor pressure of water at 20.0°C is .If the pressure of a gas collected over water was measured to be .What is the pressure of the pure gas?

Straws work because sucking creates a pressure difference.

Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C.The barometric pressure at the time was 742.5 mm Hg.What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg?

What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature was determined to be 255.0°C?

Suppose a chemical reaction generated a 50% nitrogen/50% oxygen (by volume)mixture of gas that had a total volume of 22.4 liters at STP.This gas sample is composed of:

For all gas law calculations,the temperature must be in kelvins.

What is the equivalent pressure of 760 torr in units of mm Hg?

Dalton's law of partial pressure is: P = .

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters