Partial Pressures & Vapor Pressure

Question 1

The total pressure exerted by the gases in the scuba tank was found using ___

Accepted Answer

the Law of Partial Pressures

Question 2

The mole fraction of an individual gas equals the number of moles of that gas, divided by ___

Accepted Answer

the total number of moles in the mixture

Question 3

John Dalton, best known for introducing the atomic theory into chemistry, was ___

Accepted Answer

a science teacher from England

Question 4

The vapor pressure of water is dependent on ___

Accepted Answer

the temperature of the water

Question 5

In 1803, who used real science to figure out what atoms are and how they behave?

Accepted Answer

John Dalton

Question 6

The pressure exerted by each gas individually, in the scuba tank, was found using ___

Accepted Answer

the Ideal Gas Law

Question 7

When collecting a gas over water, the only problem is liquid water ___

Accepted Answer

gives off a small amount of water vapor

Question 8

The ratio of moles of each gas in a mixture to the total number of moles is called ___

Accepted Answer

the mole fraction

Question 9

Dalton noticed that the total pressure of mixed gases in his container was always equal to ___

Accepted Answer

the sum of the individual pressures of the gases

Question 10

The baking soda, used in Hank's experiment, is more properly called ___

Accepted Answer

sodium bicarbonate

Question 11

By volume, what is the percentage of oxygen in the air that we breath?

Accepted Answer

about 21% oxygen

Question 12

What is the partial pressure of O2 in air at a total atmospheric pressure of 97.8 kPa?

Accepted Answer

about 21 kilopascals

Question 13

The number of moles is directly related to the pressure of gas it exerts, as long as ___

Accepted Answer

the volume and temperature remain constant

Question 14

Daltons's Law of Multiple Proportions says elements combine in ___

Accepted Answer

simple, whole number ratios of their masses

Question 15

Which gas is included in scuba tanks to help prevent decompression sickness?

Accepted Answer

helium

Question 16

The vinegar, in Hank's bottle, is an aqueous solution of ___

Accepted Answer

acetic acid

Question 17

When collecting a gas over water, the total pressure is equal to the pressure of ___

Accepted Answer

the collected gas plus the vapor pressure of the water

Question 18

The mixing of 300 adults at the White House dinner with 300 five-year-olds was ___

Accepted Answer

an analogy to do with gases

Question 19

Dalton's atomic theory began when he expanded the Law of Definite Proportions developed by ___

Accepted Answer

Joseph Louis Proust

Question 20

The acetic acid and sodium bicarbonate combine to form which gas?

Accepted Answer

carbon dioxide

Question 21

After finding the pressure of the carbon dioxide alone, the number of moles was found using ___

Accepted Answer

the Ideal Gas Law

Question 22

The discovery that the total pressure is the sum of the individual pressures is called ___

Accepted Answer

the Law of Partial Pressures

Question 23

Which little esoteric symbol to is used to represent the mole fraction?

Accepted Answer

the lower case Greek letter, chi

Question 24

In a glass of water, there's always a few molecules with enough kinetic energy to ___

Accepted Answer

escape the liquid

Partial Pressures & Vapor Pressure

Questions 24

Partial Pressures & Vapor Pressure

Questions 24