When oxygen (o2) is passed through an electrical spark (lightning is a good natural source of an electrical spark), ozone (o3) is formed. when the equation is balanced, the coefficient of the ozone

2.

Explanation:

The balanced equation is

3O2 >  2O3.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.