Calculating Molar Mass of Compounds

What is the definition of molar mass?

• The number of atoms in a molecule

• The density of a substance

• The amount of grams of a substance in one mole of that substance

• The volume of a substance in one mole

Where can you find the atomic masses needed to calculate molar mass?

• On a calculator

• In a chemistry textbook

• On the periodic table

• In a scientific journal

How many hydrogen atoms are in acetic acid?

• Two

• Four

• Eight

• Six

What is the molar mass of acetic acid?

• 58.044 grams per mole

• 62.068 grams per mole

• 64.080 grams per mole

• 60.052 grams per mole

How many oxygen atoms are in the mineral hydrate example?

• Five

• Four

• Three

• Two

What is the molar mass of the mineral hydrate example?

• 137.99 grams per mole

• 140.00 grams per mole

• 139.75 grams per mole

• 135.50 grams per mole

In the compound with a polyatomic ion, how many sulfur atoms are present?

• Three

• Two

• One

• Four

What is the molar mass of the compound with a polyatomic ion?

• 342.14 grams per mole

• 344.14 grams per mole

• 340.14 grams per mole

• 346.14 grams per mole

What does the subscript '3' indicate in the polyatomic ion example?

• Three molecules of water

• Three moles of the compound

• Three different elements

• Three sulfates

What is the general unit for molar mass?

• Liters per mole

• Moles per gram

• Grams per mole

• Grams per liter