Chemical Formula Atom Counting

The video tutorial explains how to count the number of atoms in the chemical formula C6H7O2(OH)3. It begins by identifying the number of each type of atom in the formula, including carbon, hydrogen, and oxygen. The tutorial then explains how to handle the parentheses and the subscript outside them, multiplying the subscript by the atoms inside the parentheses. The final atom count is calculated, resulting in a total of 21 atoms. The video concludes with a reminder to apply the subscript to all elements within the parentheses.

How many carbon atoms are present in the chemical formula C6H7O2(OH)3?

• 7

• 6

• 5

• 8

What is the total number of hydrogen atoms in the chemical formula C6H7O2(OH)3 after considering the OH group?

• 15

• 7

• 12

• 10

How many oxygen atoms are there in the chemical formula C6H7O2(OH)3?

• 2

• 3

• 5

• 6

What is the total number of atoms in the chemical formula C6H7O2(OH)3?

• 20

• 18

• 19

• 21

Why is it important to apply the subscript to all elements within the parentheses in a chemical formula?

• To reduce the number of elements

• To ensure the correct number of atoms is calculated

• To make the formula look balanced

• To simplify the chemical equation