1. Break down the formula:
* Ca(OH)2 represents one molecule of calcium hydroxide.
* It contains:
* 1 Calcium atom (Ca)
* 2 Oxygen atoms (O)
* 2 Hydrogen atoms (H)
2. Calculate the total atoms per molecule:
* 1 + 2 + 2 = 5 atoms per molecule
3. Multiply by the coefficient:
* The coefficient "3" in front of Ca(OH)2 means we have 3 molecules.
* 5 atoms/molecule * 3 molecules = 15 atoms
Therefore, there are 15 atoms in 3 Ca(OH)2.
