Question 1

Zn(s) + 2 HCl(aq) → H2(g) + ZnCl₂(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 °C and a pressure of 854 mmHg?

Accepted Answer

A) 8.56 L 
B) 0.120 L 
C) 8.32 L 
D) 22.4 L 
E) 0.382 L 
A) 8.56 L 
B) 0.120 L 
C) 8.32 L 
D) 22.4 L 
E) 0.382 L

Question 2

A gas at 5.00 atm pressure was stored in a tank during the winter at 5.0 °C. During the summer, the temperature in the storage area reached 40.0 °C. What was the pressure in the gas tank then?

Accepted Answer

A) 0.625 atm 
B) 4.44 atm 
C) 5.63 atm 
D) 40.0 atm 
E) 69.5 atm 
A) 0.625 atm 
B) 4.44 atm 
C) 5.63 atm 
D) 40.0 atm 
E) 69.5 atm

Question 3

Complete the following statement: In Charles's Law, the volume of a gas ________ when the ________ decreases.

Accepted Answer

A) increases; temperature 
B) increases; quantity of gas 
C) increases; pressure 
D) decreases; temperature 
E) decreases; pressure 
A) increases; temperature 
B) increases; quantity of gas 
C) increases; pressure 
D) decreases; temperature 
E) decreases; pressure

Question 4

The pressure exerted by a gas on its container is directly proportional to

Accepted Answer

A) the volume of the container. 
B) the mass of the individual gas molecules. 
C) the centigrade temperature of the gas. 
D) the number of moles of gas in the sample. 
E) the Fahrenheit temperature of the gas. 
A) the volume of the container. 
B) the mass of the individual gas molecules. 
C) the centigrade temperature of the gas. 
D) the number of moles of gas in the sample. 
E) the Fahrenheit temperature of the gas.

Question 5

The boiling point of water at sea level is 100 °C. At higher altitudes, the boiling point of water will be

Accepted Answer

A) lower, because temperatures are lower. 
B) lower, because the atmospheric pressure is lower. 
C) higher, because the altitude is greater. 
D) higher, because there are fewer water molecules in the air. 
E) the same, because water always boils at 100 °C. 
A) lower, because temperatures are lower. 
B) lower, because the atmospheric pressure is lower. 
C) higher, because the altitude is greater. 
D) higher, because there are fewer water molecules in the air. 
E) the same, because water always boils at 100 °C.

Question 6

STP stands for 25 °C and 760 mmHg.

Accepted Answer

A) True 
 B)False

Question 7

If atmospheric pressure on a certain day is 749 mmHg, what is the partial pressure of nitrogen, given that nitrogen is about 78% of the atmosphere?

Accepted Answer

A) 170 mmHg 
B) 580 mmHg 
C) 600 mmHg 
D) 750 mmHg 
E) 760 mmHg 
A) 170 mmHg 
B) 580 mmHg 
C) 600 mmHg 
D) 750 mmHg 
E) 760 mmHg

Question 8

The use of high-pressure chambers to control disease processes is known as ________.

Accepted Answer

The answer of The use of high-pressure chambers to control...

Question 9

A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas pressure when the temperature changes to 450 K, at constant moles and volume?

Accepted Answer

A) 1.5 atm 
B) 0.94 atm 
C) 0.47 atm 
D) 2.1 atm 
E) 1.1 atm 
A) 1.5 atm 
B) 0.94 atm 
C) 0.47 atm 
D) 2.1 atm 
E) 1.1 atm

Question 10

What is the mass of neon that exerts a pressure of 720. mmHg,with a temperature of -15.0 °C , when the volume of the container is 760. mL?

Accepted Answer

A) 0.0340 g 
B) 0.686 g 
C) 0.615 g 
D) 517 g 
E) 25.8 g 
A) 0.0340 g 
B) 0.686 g 
C) 0.615 g 
D) 517 g 
E) 25.8 g

Question 11

Zn(s) + 2HCl(aq) → H2(g) + ZnCl₂(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at STP?

Accepted Answer

A) 4.28 L 
B) 0.0171 L 
C) 8.56 L 
D) 22.4 L 
E) 0.382 L 
A) 4.28 L 
B) 0.0171 L 
C) 8.56 L 
D) 22.4 L 
E) 0.382 L

Question 12

1 mmHg is the same as 760 atm.

Accepted Answer

A) True 
 B)False

Question 13

At STP, temperature and pressure have the values of

Accepted Answer

A) 0 K and 1 atm. 
B) 273 K and 1 mmHg. 
C) 273 K and 760 mmHg. 
D) 0 K and 760 mmHg. 
E) 760 K and 273 atm. 
A) 0 K and 1 atm. 
B) 273 K and 1 mmHg. 
C) 273 K and 760 mmHg. 
D) 0 K and 760 mmHg. 
E) 760 K and 273 atm.

Question 14

In Gay-Lussac's Law, the pressure of a gas increases due to an increase in temperature because

Accepted Answer

A) the molecules strike the walls of the container less often. 
B) the molecules strike the walls of the container more often. 
C) the molecules get bigger. 
D) there is a decrease in the volume of the container. 
E) there is an increase in the number of gas particles. 
A) the molecules strike the walls of the container less often. 
B) the molecules strike the walls of the container more often. 
C) the molecules get bigger. 
D) there is a decrease in the volume of the container. 
E) there is an increase in the number of gas particles.

Question 15

At constant temperature, a sample of helium at 760. torr in a closed container was compressed from 5.00 L to 3.00 L, with no change in moles or temperature. What was the new pressure exerted by the helium on its container?

Accepted Answer

A) 800. torr 
B) 2280 torr 
C) 15.0 torr 
D) 3800 torr 
E) 1270 torr 
A) 800. torr 
B) 2280 torr 
C) 15.0 torr 
D) 3800 torr 
E) 1270 torr

Question 16

Boyle's Law is usually written as ________.

Accepted Answer

The answer of Boyle's Law is usually written as ________....

Question 17

The force of gas particles against the walls of a container is called

Accepted Answer

A) pressure. 
B) volume. 
C) temperature. 
D) quantity of gas. 
E) density. 
A) pressure. 
B) volume. 
C) temperature. 
D) quantity of gas. 
E) density.

Question 18

In the combined gas law, temperatures are given in °C.

Accepted Answer

A) True 
 B)False

Question 19

At STP conditions, 11 g of SO2 has a volume of

Accepted Answer

A) 250 L. 
B) 3.8 L. 
C) 22 L. 
D) 0.0076 L. 
E) 130 L. 
A) 250 L. 
B) 3.8 L. 
C) 22 L. 
D) 0.0076 L. 
E) 130 L.

Question 20

The volume of 1 mole of an ideal gas at STP is 22.4 L.

Accepted Answer

A) True 
 B)False

Exam 8: Gases

Zn(s) + 2 HCl(aq) → H2(g) + ZnCl₂(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 °C and a pressure of 854 mmHg?

A gas at 5.00 atm pressure was stored in a tank during the winter at 5.0 °C. During the summer, the temperature in the storage area reached 40.0 °C. What was the pressure in the gas tank then?

Complete the following statement: In Charles's Law, the volume of a gas ________ when the ________ decreases.

The pressure exerted by a gas on its container is directly proportional to

The boiling point of water at sea level is 100 °C. At higher altitudes, the boiling point of water will be

STP stands for 25 °C and 760 mmHg.

If atmospheric pressure on a certain day is 749 mmHg, what is the partial pressure of nitrogen, given that nitrogen is about 78% of the atmosphere?

The use of high-pressure chambers to control disease processes is known as ________.

A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas pressure when the temperature changes to 450 K, at constant moles and volume?

What is the mass of neon that exerts a pressure of 720. mmHg,with a temperature of -15.0 °C , when the volume of the container is 760. mL?

Zn(s) + 2HCl(aq) → H2(g) + ZnCl₂(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at STP?

1 mmHg is the same as 760 atm.

At STP, temperature and pressure have the values of

In Gay-Lussac's Law, the pressure of a gas increases due to an increase in temperature because

At constant temperature, a sample of helium at 760. torr in a closed container was compressed from 5.00 L to 3.00 L, with no change in moles or temperature. What was the new pressure exerted by the helium on its container?

Boyle's Law is usually written as ________.

The force of gas particles against the walls of a container is called

In the combined gas law, temperatures are given in °C.

At STP conditions, 11 g of SO2 has a volume of

The volume of 1 mole of an ideal gas at STP is 22.4 L.

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Zn(s) + 2 HCl(aq) → H2(g) + ZnCl₂(aq) When 25.0 g of Zn reacts, how many L of H₂ gas are formed at 25 °C and a pressure of 854 mmHg?

Complete the following statement: In Charles's Law, the volume of a gas when the decreases.

Zn(s) + 2HCl(aq) → H₂(g) + ZnCl₂(aq) When 25.0 g of Zn reacts, how many L of H₂ gas are formed at STP?

At STP conditions, 11 g of SO₂ has a volume of