Molar Mass and Chemical Composition

This video tutorial explains how to calculate the molar mass, also known as molecular weight, of aluminum oxide (Al2O3). The instructor, Dr. B, uses a periodic table that rounds to two decimal points. He demonstrates the calculation by first determining the contribution of aluminum atoms, then the contribution of oxygen atoms, and finally summing these values to find the total molar mass of Al2O3, which is 101.96 grams per mole.

What is another term used for molar mass?

• Molecular weight

• Elemental mass

• Gram weight

• Atomic weight

How many aluminum atoms are present in Al2O3?

• Four

• Three

• Two

• One

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

• 101.96 g/mol

• 53.96 g/mol

• 26.98 g/mol

• 16.00 g/mol

How many oxygen atoms are present in Al2O3?

• Four

• One

• Three

• Two

What is the final calculated molar mass of Al2O3?

• 101.96 g/mol

• 48.00 g/mol

• 26.98 g/mol

• 53.96 g/mol