Molar Mass and Molecular Formulas

The video tutorial explains how to calculate the molar mass of acetylsalicylic acid, commonly known as aspirin. It begins by identifying the molecular formula of aspirin as C9H8O4. The tutorial then demonstrates how to use the periodic table to find the atomic masses of carbon, hydrogen, and oxygen. By multiplying these atomic masses by the number of each type of atom in the formula and summing the results, the molar mass of aspirin is calculated to be 180.17 grams per mole. The video concludes with a brief summary of the process.

What is another name for acetosalicylic acid?

• Ibuprofen

• Paracetamol

• Naproxen

• Aspirin

How many carbon atoms are present in the molecular formula of aspirin?

• 6

• 8

• 12

• 9

What is the molecular formula of aspirin?

• C8H10O2

• C10H8O4

• C9H8O4

• C7H6O3

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

• 1.01 g/mol

• 16.00 g/mol

• 14.01 g/mol

• 12.01 g/mol

How many hydrogen atoms are in the aspirin molecule?

• 6

• 8

• 10

• 12

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

• 12.01 g/mol

• 14.01 g/mol

• 16.00 g/mol

• 1.01 g/mol

What is the calculated molar mass of aspirin?

• 180.17 g/mol

• 150.17 g/mol

• 200.17 g/mol

• 170.17 g/mol

Why might the calculated molar mass of aspirin vary slightly?

• Aspirin has different isotopes

• Human error in calculation

• Different calculators give different results

• Different periodic tables round differently

What is the weight of one mole of aspirin?

• 170.17 grams

• 150.17 grams

• 180.17 grams

• 200.17 grams