Molar Mass and Chemical Composition

This video tutorial explains how to find the molar mass of oxalic acid (C2H2O4). It begins with an introduction to the concept of molar mass and the structure of oxalic acid. The video then provides a detailed calculation of the molar mass using the periodic table values for carbon, hydrogen, and oxygen. The final molar mass is calculated as 90.04 grams per mole, with a note on rounding differences based on periodic table versions.

What is the chemical formula for oxalic acid?

• C3H6O3

• C2H2O4

• C2H4O2

• C3H2O4

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

• 12.01 grams per mole

• 14.01 grams per mole

• 16.00 grams per mole

• 1.01 grams per mole

How many carbon atoms are present in C2H2O4?

• 4

• 3

• 2

• 1

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

• 2.02 grams per mole

• 1.01 grams per mole

• 16.00 grams per mole

• 12.01 grams per mole

How many oxygen atoms are present in C2H2O4?

• 2

• 3

• 4

• 5

What is the final molar mass of C2H2O4?

• 88.02 grams per mole

• 90.04 grams per mole

• 92.06 grams per mole

• 94.08 grams per mole

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

• Different tables use different atomic masses

• Different tables have different elements

• Different tables use different units

• Different tables have different colors