Molar Mass and Chemical Composition

The video tutorial explains how to calculate the molar mass of aluminum carbonate. It begins by identifying the atomic mass of aluminum from the periodic table and multiplying it by two, as there are two aluminum atoms in the compound. Next, it calculates the contribution of carbon and oxygen, considering the stoichiometry of the compound. The tutorial demonstrates the step-by-step addition of these values to find the total molar mass, emphasizing the importance of using correct units. The final molar mass of aluminum carbonate is calculated to be 233.99 grams per mole.

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

• 16.00

• 12.01

• 26.98

• 53.96

How many oxygen atoms are present in the carbonate group of aluminum carbonate?

• 2

• 1

• 4

• 3

What is the total mass of the carbonate group (CO3) in aluminum carbonate?

• 180.03

• 233.99

• 60.01

• 48.00

What is the final molar mass of aluminum carbonate?

• 26.98 g/mol

• 180.03 g/mol

• 53.96 g/mol

• 233.99 g/mol

Why is it important to use units when calculating molar mass?

• To ensure accuracy

• To make calculations easier

• To avoid confusion with other measurements

• To impress others