Molar Mass and Chemical Composition

The video tutorial explains how to calculate the molar mass of sodium phosphate (Na3PO4). It begins by identifying the atomic masses of sodium, phosphorus, and oxygen from the periodic table. The tutorial then demonstrates how to multiply these atomic masses by the number of each type of atom in the compound. Finally, it adds these values together to find the total molar mass of Na3PO4, which is 163.94 grams per mole. The importance of including units in the final answer is emphasized.

What is the atomic mass of sodium as used in the calculation of Na3PO4's molar mass?

• 22.99 grams per mole

• 30.97 grams per mole

• 18.02 grams per mole

• 16.00 grams per mole

How many sodium atoms are present in one formula unit of Na3PO4?

• 4

• 1

• 3

• 2

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

• 16.00 grams per mole

• 22.99 grams per mole

• 18.02 grams per mole

• 30.97 grams per mole

How many oxygen atoms are present in one formula unit of Na3PO4?

• 3

• 5

• 2

• 4

What is the total molar mass of Na3PO4?

• 150.00 grams per mole

• 200.00 grams per mole

• 163.94 grams per mole

• 180.00 grams per mole