Molar Mass and Chemical Compounds

The video tutorial explains how to calculate the molar mass of magnesium iodide (MgI2). It begins by identifying the molar mass of magnesium from the periodic table, which is 24.31 grams per mole. Then, it finds the molar mass of iodine, which is 126.90 grams per mole, and since there are two iodine atoms, this value is multiplied by two. The tutorial then adds the molar masses of magnesium and iodine to get the total molar mass of MgI2, which is 284.11 grams per mole. The video concludes by explaining that this means one mole of MgI2 weighs 284.11 grams.

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

• 12.01 grams per mole

• 24.31 grams per mole

• 126.90 grams per mole

• 1.01 grams per mole

How many iodine atoms are present in one molecule of MgI2?

• Two

• Four

• One

• Three

What is the total mass of iodine in one mole of MgI2?

• 126.90 grams

• 284.11 grams

• 253.80 grams

• 24.31 grams

What is the molar mass of magnesium iodide (MgI2)?

• 200.00 grams per mole

• 284.11 grams per mole

• 100.00 grams per mole

• 150.21 grams per mole

If you have 284.11 grams of MgI2, how many moles do you have?

• 3 moles

• 0.5 moles

• 1 mole

• 2 moles

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