Molar Mass and Chemical Compounds

The video tutorial explains how to find the molar mass of magnesium bromide (MgBr2) using the periodic table. It begins by identifying the molar mass of magnesium and bromine, then calculates the total molar mass of MgBr2. The tutorial concludes with an explanation of the significance of molar mass, emphasizing that 184.11 grams of MgBr2 is equivalent to one mole.

What is the molar mass of magnesium as found on the periodic table?

• 79.90 grams per mole

• 1.01 grams per mole

• 24.31 grams per mole

• 12.01 grams per mole

How many bromine atoms are present in MgBr2?

• Three

• Four

• Two

• One

What is the molar mass of bromine used in the calculation?

• 1.01 grams per mole

• 24.31 grams per mole

• 79.90 grams per mole

• 12.01 grams per mole

What is the total molar mass of MgBr2?

• 150.00 grams per mole

• 200.00 grams per mole

• 184.11 grams per mole

• 160.00 grams per mole

If you have 184.11 grams of MgBr2, how many moles do you have?

• Three moles

• Two moles

• One mole

• Half a mole

What does the molar mass of a compound represent?

• The number of atoms in a molecule

• The mass of one mole of the compound

• The volume of the compound

• The density of the compound