Molar Mass and Chemical Composition

The video tutorial explains how to calculate the molar mass of ammonium carbonate. It begins by identifying the molar mass of nitrogen, hydrogen, carbon, and oxygen from the periodic table. The instructor demonstrates the calculation for ammonium ions and combines these with carbon and oxygen to find the total molar mass of ammonium carbonate, which is 96.11 grams per mole. The video concludes with a note on rounding differences based on periodic table versions.

What is the molar mass of nitrogen as found on the periodic table?

• 1.01 grams per mole

• 16.00 grams per mole

• 12.01 grams per mole

• 14.01 grams per mole

How many hydrogen atoms are present in one ammonium ion (NH4)?

• Four

• Five

• Three

• Two

Why do we multiply the ammonium ion's contribution by two in the calculation?

• Because there are two nitrogen atoms

• Because there are two carbon atoms

• Because there are two ammonium ions

• Because there are two oxygen atoms

What is the molar mass of carbon as used in the calculation?

• 12.01 grams per mole

• 14.01 grams per mole

• 16.00 grams per mole

• 1.01 grams per mole

How many oxygen atoms are present in ammonium carbonate?

• Four

• Three

• Two

• One

What is the final calculated molar mass of ammonium carbonate?

• 96.11 grams per mole

• 100.11 grams per mole

• 94.11 grams per mole

• 98.11 grams per mole

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

• Different periodic table rounding

• Different number of atoms

• Different chemical formula

• Different calculation method