How do I balance this
H2 + O2 = H2O

2 H2 + O2 = 2 H2O

Explanation:

H2 + O2 = H2O

- Left side: 2H and 2O

- Right side: 2H and 1O

Add a coefficient of 2 to the right side

H2 + O2 = 2 H2O

- Left side is still: 2H and 2O

- Right side now has: 4H and 2O

Add a coefficient of 2 to H2 on the left side

2 H2 + O2 = 2 H2O

- Left side still has: 4H and 2O

- Right side now has: 4H and 2O

2 H2 + O2 = 2 H2O is the balanced equation.

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.