Understanding Molar Mass

What is the unit for molar mass?

• Atoms per mole

• Kilograms per mole

• Grams per mole

• Moles per gram

Which of the following terms is NOT synonymous with molar mass?

• Atomic number

• Molecular mass

• Molecular weight

• Formula mass

How do you determine the molar mass of a compound using the periodic table?

• Subtract the atomic numbers from the atomic mass numbers

• Multiply the atomic numbers of each element

• Add up the atomic mass numbers of each element

• Add up the atomic numbers of each element

What is the molar mass of nitrogen dioxide (NO2)?

• 30 grams per mole

• 32 grams per mole

• 46 grams per mole

• 60 grams per mole

What is the molar mass of calcium carbonate (CaCO3)?

• 200 grams per mole

• 50 grams per mole

• 100 grams per mole

• 150 grams per mole

How many oxygen atoms are in one formula unit of aluminum sulfate, Al2(SO4)3?

• 12

• 16

• 8

• 4

What is the molar mass of aluminum sulfate, Al2(SO4)3?

• 400 grams per mole

• 250 grams per mole

• 300 grams per mole

• 342 grams per mole

In a hydrated compound, what does the dot between the compound and water signify?

• Addition of masses

• Multiplication of masses

• Subtraction of masses

• Division of masses

How many water molecules are associated with one formula unit of hydrated copper(II) chloride?

• Three

• Four

• Two

• One

What is the molar mass of hydrated copper(II) chloride?

• 200 grams per mole

• 180 grams per mole

• 150 grams per mole

• 170.5 grams per mole