Molar Mass and Chemical Compounds

The video tutorial explains how to calculate the molar mass of aluminum chloride (AlCl3). It begins by identifying the atomic masses of aluminum and chlorine from the periodic table. The mass of aluminum is 26.98 grams per mole, and the mass of chlorine is 35.45 grams per mole. Since there are three chlorine atoms in AlCl3, the mass of chlorine is multiplied by three. The tutorial then adds the mass of aluminum to the total mass of chlorine to find the molar mass of AlCl3, which is 133.33 grams per mole.

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

• 1.01 grams per mole

• 12.01 grams per mole

• 35.45 grams per mole

• 26.98 grams per mole

How many chlorine atoms are present in AlCl3?

• Four

• Three

• Two

• One

What is the molar mass of a single chlorine atom?

• 26.98 grams per mole

• 35.45 grams per mole

• 12.01 grams per mole

• 1.01 grams per mole

What is the total molar mass of AlCl3?

• 98.99 grams per mole

• 133.33 grams per mole

• 150.00 grams per mole

• 120.45 grams per mole

What units are used for expressing molar mass?

• Grams per liter

• Grams per mole

• Moles per gram

• Liters per mole