# Question #44190

Aug 18, 2017

+4

#### Explanation:

Oxygen is almost always -2. It is in this case, and since CO2 is neutral in charge, oxygen's charge must be balanced out by carbon's. $\left(- 2\right) \cdot 2 + x = 0$
$x = 4$
Also, +4 is a pretty common oxidation state for carbon, because it has 4 valence electrons.