Question: what are two examples of a chemical reaction?
Answer: The rusting of iron.
Combustion (burning) of wood.
The metabolism of food in the body.
Mixing an acid and a base, such as hydrochloric acid (HCl) and sodium hydroxide (NaOH)
Cooking an egg.
Digesting sugar with the amylase in saliva.
Mixing baking soda and vinegar to produce carbon dioxide gas.