Atomic Mass and Molar Calculations

The video tutorial explains how to calculate the molar mass of calcium carbonate (CaCO3). It begins by identifying the atomic masses of calcium, carbon, and oxygen from the periodic table. The tutorial then demonstrates how to calculate the total mass of oxygen by multiplying its atomic mass by three, as there are three oxygen atoms in the compound. The final molar mass of calcium carbonate is calculated by summing the masses of calcium, carbon, and oxygen. The video concludes with a note on rounding differences and a thank you from Dr. B.

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

• 40.08 grams per mole

• 100.09 grams per mole

• 12.01 grams per mole

• 16.00 grams per mole

How many oxygen atoms are present in calcium carbonate (CaCO3)?

• 4

• 3

• 1

• 2

What is the atomic mass of carbon used in the calculation?

• 40.08 grams per mole

• 16.00 grams per mole

• 100.09 grams per mole

• 12.01 grams per mole

What is the total molar mass of calcium carbonate (CaCO3) as calculated in the video?

• 132.09 grams per mole

• 116.09 grams per mole

• 100.09 grams per mole

• 84.09 grams per mole

Why might your calculated molar mass differ slightly from the one in the video?

• Different periodic tables

• Rounding to different decimal points

• Using incorrect atomic masses

• Miscounting the number of atoms