Counting Atoms Practice!

Front

What is the formula to calculate the total number of atoms in a compound?

Back

Add the subscripts of all elements in the chemical formula.

Front

How many potassium atoms are in K₈?

Back

8

Front

What does the subscript in a chemical formula represent?

Back

The number of atoms of the element in the compound.

Front

How many total atoms are in the compound C₂H₈O?

Back

11

Front

In the compound Al(OH)₃, how many oxygen atoms are present?

Back

3

Front

What is the total number of atoms in H₂C₃O₄N₅?

Back

13

Front

If a compound has a formula of C₄H₁₀, how many hydrogen atoms are there?

Back

10

Front

What is the significance of parentheses in a chemical formula?

Back

They indicate that the enclosed atoms are grouped together and the subscript outside applies to all atoms inside.

Front

How many carbon atoms are in the compound C₃H₆O?

Back

3

Front

In the formula Mg(OH)₂, how many total oxygen atoms are there?

Back

2