Counting Atoms Practice

Front

What is the chemical formula for Aluminum Sulfate?

Back

Al₂(SO₄)₃

Front

How many total atoms are in the compound Al₂(SO₄)₃?

Back

26

Front

What does a subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

How many Oxygen atoms are in the compound Al₂(SO₄)₃?

Back

12

Front

How many Aluminum atoms are in Al₂O₃?

Back

2

Front

What is the significance of no subscript following an element symbol in a chemical formula?

Back

It indicates that there is only 1 atom of that element.

Front

In the compound H₂C₃O₄N₅, how many Carbon atoms are present?

Back

3

Front

How many atoms are in the molecule O₂?

Back

2

Front

What is the total number of atoms in the compound H₂O?

Back

3 (2 Hydrogen + 1 Oxygen)

Front

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

Back

Add the number of atoms of each element, considering their subscripts.