Question

How many atoms of each element are in the chemical formula `Ca(OH)_2`?

Answer 1

5

Explanation:

Ca is 1 since there is no subscript and O and H each have 2 because the subscript 2 is outside the parenthesis.

`i.e. color(red)(1)Ca +color(red)(2)O+color(red)(2)H = 5 " atoms"`