LL U3 Pre-Lab: MM of CO2

LL Unit 3

Pre-Lab: Determining Molar Mass of Carbon Dioxide​

Agenda ​

1. Crash Course Partial Pressure (Watch & Take Notes)

2. ​Check on Learning

3. Read Procedures and create data table/list​

Multiple Choice

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

• a bad dream

• an analogy to do with gases

• based on a real event

• foreshadowing

Multiple Choice

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

• Robert Boyle

• Albert Einstein

• John Dalton

• Johannes Diderik van der Waals

Multiple Choice

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

• an English teacher from France

• a French teacher from England

• an English teacher from Scotland

• a science teacher from England

Multiple Choice

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

• Joseph Priestley

• Joseph Louis Proust

• Antoine Lavoisier

• Dmitri Mendeleev

Multiple Choice

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

• simple, whole number ratios of their masses

• equal proportions by number

• equal proportions by mass

• only one way

Multiple Choice

While mixing gases, Dalton noticed that the total internal pressure of his container was always equal to ___

• the sum of the individual pressures of the gases

• the product of the individual pressures of the gases

• the pressure of the most abundant gas

• the pressure of the least abundant gas

Multiple Choice

The discovery that the total pressure of a mixture of gases is equal to the sum of the individual pressures is called ___

• Dalton's Law

• the Law of Summed Pressures

• the Law of Partial Pressures

• the Additive Property of gases

Multiple Choice

Along with oxygen for breathing, which gas is included in scuba tanks to help prevent decompression sickness?

• nitrogen

• helium

• carbon dioxide

• hydrogen

Multiple Choice

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

• Proust's Law of Definite Proportions

• the Law of Multiple Proportions

• the Law of Partial Pressures

• the Ideal Gas Law

Multiple Choice

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

• Proust's Law of Definite Proportions

• the Law of Multiple Proportions

• the Law of Partial Pressures

• the Ideal Gas Law

Multiple Choice

The ratio of moles of the individual gases in a mixture to the total number of moles is called ___

• fractional molarity

• fractional distillation

• the mole fraction

• the empirical formula

Multiple Choice

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

• the lower case Greek letter, chi

• the upper case Greek letter, psi

• the lower case Greek letter, upsilon

• the upper case Greek letter, tau

Multiple Choice

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

• the partial pressures of that gas

• the total pressure of the gases

• the total number of moles in the mixture

• the molar mass of the gas

Multiple Choice

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

• the volume and temperature remain constant

• it's not at STP

• it's at absolute zero

• it's a real gas

Multiple Choice

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

• about 21% oxygen

• about 38% oxygen

• about 62% oxygen

• about 95% oxygen

Multiple Choice

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

• about 15 kilopascals

• about 21 kilopascals

• about 32 kilopascals

• about 63 kilopascals

Multiple Choice

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

• is a liquid not a gas

• is a polar molecule

• gives off a small amount of water vapor

• moves around a lot

Multiple Choice

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

• heat up the liquid

• escape the liquid

• start a chemical reaction

• break the glass

Multiple Choice

The vapor pressure of water, which is the partial pressure of water vapor in the gas above it, is dependent on ___

• the total pressure

• the molar mass of water

• the volume of the water

• the temperature of the water

Multiple Choice

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

• plus atmospheric pressure

• minus atmospheric pressure

• plus the vapor pressure of the water

• minus the vapor pressure of the water

Multiple Choice

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

• acetic acid

• sulfuric acid

• hydrochloric acid

• nitric acid

Multiple Choice

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

• cream of tartar

• sodium bicarbonate

• sodium chloride

• potassium bitartrate

Multiple Choice

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

• oxygen

• hydrogen

• carbon monoxide

• carbon dioxide

Multiple Choice

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

• the Law of Partial Pressures

• the Ideal Gas Law

• the mole fraction equation

• the Law of Multiple Proportions

Now read the procedures and create a data table / list.

Some text here about the topic of discussion