Molar Mass of Calcium Sulfate

The video tutorial explains how to calculate the molar mass of calcium sulfate (CaSO4). It begins by referencing the periodic table to find the atomic masses of calcium, sulfur, and oxygen. The tutorial then demonstrates the calculation process by adding these atomic masses and multiplying by the number of oxygen atoms in the compound. The final result is a molar mass of 136.15 grams per mole for calcium sulfate. The video concludes with a brief closing statement from Dr. B.

What is the first step in finding the molar mass of a compound like calcium sulfate?

• Ignore the atomic masses.

• Divide the atomic masses by the number of atoms.

• Multiply the atomic masses by 2.

• Consult the periodic table for atomic masses.

Which of the following is the atomic mass of sulfur used in the calculation?

• 12.01 grams per mole

• 40.08 grams per mole

• 32.07 grams per mole

• 16.00 grams per mole

How many oxygen atoms are considered in the calculation of calcium sulfate's molar mass?

• 3

• 1

• 4

• 2

What is the final molar mass of calcium sulfate as calculated in the video?

• 160.15 grams per mole

• 120.15 grams per mole

• 136.15 grams per mole

• 150.15 grams per mole

What is the chemical formula for calcium sulfate?

• CaO4S

• CaSO4

• CaS2O4

• CaSO3