Molar Mass and Ammonium Sulfate

This video tutorial explains how to calculate the molar mass of ammonium sulfate (NH4)2SO4. It begins by identifying the atomic masses of nitrogen, hydrogen, sulfur, and oxygen from the periodic table. The video then demonstrates how to multiply these atomic masses by the number of atoms present in the compound. The tutorial concludes with the final calculation of the molar mass, which is 132.17 grams per mole, and notes that variations may occur depending on the periodic table used.

What is the chemical formula for ammonium sulfate?

• NH3SO4

• (NH4)2SO4

• NH2SO4

• NH4SO3

How many hydrogen atoms are present in one formula unit of ammonium sulfate?

• 8

• 6

• 4

• 2

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

• 1.01 grams per mole

• 14.01 grams per mole

• 12.01 grams per mole

• 16.00 grams per mole

What is the molar mass of sulfur in ammonium sulfate?

• 14.01 grams per mole

• 16.00 grams per mole

• 32.07 grams per mole

• 1.01 grams per mole

How many oxygen atoms are present in ammonium sulfate?

• 2

• 3

• 4

• 5

What is the total molar mass of ammonium sulfate as calculated in the video?

• 130.17 grams per mole

• 136.17 grams per mole

• 128.17 grams per mole

• 132.17 grams per mole

Why might the calculated molar mass differ slightly when using different periodic tables?

• Due to rounding differences

• Due to incorrect chemical formulas

• Due to measurement errors

• Due to different chemical properties