# How do you balance the following equation: Ca + O_2 -> CaO?

Apr 10, 2017

$C a + \frac{1}{2} {O}_{2} \rightarrow C a O$

#### Explanation:

Make sure there's the same number of atoms on each side of the equation,

On the left side there are $2$ $O$ atoms and only $1$ $O$ atom on the right.

Therefore,

$C a + \frac{1}{2} {O}_{2} \rightarrow C a O$

This is the balanced reaction (it's ok to have fractions as the coefficient).