Chemical Composition of Aspirin

The video tutorial explains how to determine the number of atoms in the chemical formula C9H8O4, which represents aspirin. It breaks down the process of identifying the number of carbon, hydrogen, and oxygen atoms based on the subscripts in the formula. The tutorial then demonstrates how to calculate the total number of atoms by adding the individual counts of each element, resulting in a total of 21 atoms for aspirin.

What elements are present in the chemical formula C9H8O4?

• Carbon, Oxygen, and Nitrogen

• Hydrogen, Oxygen, and Nitrogen

• Carbon, Hydrogen, and Nitrogen

• Carbon, Hydrogen, and Oxygen

In the formula C9H8O4, what does the subscript '9' indicate?

• The number of carbon atoms

• The total number of atoms

• The number of oxygen atoms

• The number of hydrogen atoms

How many hydrogen atoms are present in C9H8O4?

• 9

• 21

• 8

• 4

What is the total number of atoms in a molecule of aspirin (C9H8O4)?

• 30

• 25

• 21

• 17

Which of the following correctly represents the sum of carbon, hydrogen, and oxygen atoms in aspirin?

• 9 + 8 + 4 = 19

• 9 + 8 + 4 = 21

• 9 + 8 + 4 = 22

• 9 + 8 + 4 = 20