# How do you write a balanced equation for the complete combustion of C_3H_6O?

Sep 8, 2016

Add coefficients in front of each species so there is the same number of atoms of each element on both sides of the equation. Never change subscripts.

#### Explanation:

Complete combustion of an organic substance requires oxygen and produces carbon dioxide and water.

Unbalanced Equation

${\text{C"_3"H"_6"O" + "O}}_{2}$$\rightarrow$$\text{CO"_2" + H"_2"O}$

Balanced Equation

${\text{C"_3"H"_6"O" + "4O}}_{2}$$\rightarrow$$\text{3CO"_2" + 3H"_2"O}$

Notice that there are 3 carbon atoms on both sides, 6 hydrogen atoms on both sides, and 9 oxygen atoms on both sides.

Also notice that no chemical formula was changed (no change in subscripts.