A balanced reaction equation must have the same number of atoms of each element on both sides of the equation. The reaction given below represents the combustion of propanol. To verify that the equation is balanced, count the atoms of each element on both sides of the reaction.

2CH7OH+9O2------>6CO2+8H2O

How many C, H, O atoms is reactants?
How many C, H, O atoms in the products?