Chem 8-1 The Mole

Multiple Choice

Which of the following best describes a mole in chemistry?

• A unit representing the number of atoms, molecules, or particles in a sample

• A type of animal used as a chemistry mascot

• A measurement of temperature

• A device for measuring mass

Open Ended

Why is the concept of the mole important in chemistry?

Multiple Choice

Which of the following best describes a mole in chemistry?

• A unit representing 6.022 x 10^23 things, similar to a dozen or a gross

• A unit representing 12 things

• A unit representing the mass of an atom

• A unit representing the volume of a substance

Open Ended

Explain the difference between atomic weight and molar mass, and why each is important in chemistry.

Fill in the Blanks

The number of molecules in a sample can be calculated using the sample's mass and the substance's

mass.

Open Ended

What are the steps to calculate the molar mass of a compound such as barium nitrate?

Multiple Select

Which of the following statements about molar mass is/are correct?

• It is the mass of 1 mole of a substance.

• It is measured in grams.

• It is always different from atomic weight.

• It can be calculated by adding the atomic weights of all atoms in a compound.

Multiple Choice

Why do scientists calculate the molar mass of a compound?

• To determine the color of the compound

• To convert the mass of a compound sample to the number of moles or molecules in a sample

• To find the melting point of the compound

• To measure the temperature of the compound

Fill in the Blanks

The unit for molar mass is

per mole.

Multiple Select

Which of the following are necessary steps in calculating the molar mass of a compound?

• Write the chemical formula and determine the number of each type of atom

• Multiply the atomic weight of each element by the number of atoms

• Add all of the calculated values together and use grams/mole as the unit

• Measure the temperature of the compound

Open Ended

Explain the steps involved in calculating the molar mass of barium nitrate.

Open Ended

Summarize what you have learned about the mole and its importance in chemistry in one or two sentences.

Open Ended

After learning about the mole and its significance in chemistry, what is one question you still have or something you would like to know more about regarding this topic?