Atomic Mass and Molecular Composition

This video tutorial explains how to calculate the molar mass of ethene (C2H4). It begins by identifying the atomic masses of carbon and hydrogen from the periodic table. The tutorial then demonstrates how to multiply these atomic masses by the number of each type of atom in the molecule. Finally, it adds these values together to find the total molar mass of C2H4, which is 28.06 grams per mole.

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

• 14.01 grams per mole

• 12.01 grams per mole

• 16.00 grams per mole

• 1.01 grams per mole

How many carbon atoms are present in a molecule of C2H4?

• 1

• 4

• 3

• 2

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

• 16.00 grams per mole

• 14.01 grams per mole

• 12.01 grams per mole

• 1.01 grams per mole

How many hydrogen atoms are present in a molecule of C2H4?

• 4

• 5

• 3

• 2

What is the final molar mass of C2H4 as calculated in the video?

• 32.00 grams per mole

• 30.08 grams per mole

• 28.06 grams per mole

• 24.02 grams per mole