Mole Theory Review

What is a mole in scientific terms?

• A small mammal that digs tunnels underground.

• A unit of currency.

• A unit to measure large quantities of very small atoms, particles, or other specified particles.

• A type of sauce used in Mexican cuisine.

Do moles always contain the same number of particles?

• Yes, but they can have different masses.

• No, they contain different numbers of particles.

• Yes, and they also have the same mass.

• No, they are defined by their mass only.

What is the approximate number of particles in one mole?

• 6.022 x 10^23

• 3.141 x 10^22

• 1.602 x 10^19

• 9.109 x 10^31

What is the molar mass of a substance?

• The mass in kilograms of one mole of any pure substance

• The mass in grams of one mole of any pure substance

• The volume in liters of one mole of any pure substance

• The number of particles in one mole of any pure substance

What is the relationship between molar mass and atomic mass?

• Molar Mass > atomic mass

• Molar Mass < atomic mass

• Molar Mass = atomic mass

• Molar Mass is unrelated to atomic mass

What are the units of molar mass?

• kg/mol

• g/mol

• L/mol

• mol/L

How many atoms of iron are there in 1 mole of iron?

• 6.02 x 10^22 atoms of iron

• 6.02 x 10^23 atoms of iron

• 6.02 x 10^24 atoms of iron

• 6.02 x 10^25 atoms of iron

What is the first step in finding the molar mass of a compound?

• Add the total masses for each element together

• Multiply the mass number for that element by the number of that element you have in the compound

• Find the mass number for each element in the compound on the periodic table

• Calculate the average atomic mass of the compound

After finding the mass number for each element in a compound, what is the next step to determine the molar mass?

• Add the total masses for each element together

• Find the mass number for each element in the compound on the periodic table

• Calculate the average atomic mass of the compound

• Multiply the mass number for that element by the number of that element you have in the compound

What do you do after multiplying the mass number for each element by the number of that element you have in the compound to find the molar mass?

• Find the mass number for each element in the compound on the periodic table

• Calculate the average atomic mass of the compound

• Add the total masses for each element together

• Divide the total mass by Avogadro's number