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The list of uses in life is endless.
As mentioned above, it is used in medicine and healthcare as reactions are always going on in the body.
Chemistry is used in the manufacture of almost everything. One example is building ships, knowing which metals to use and which ones will react with water.Which ones complement each other [which ones will be oxidised to prevent others from reacting].
One obvious example of chemistry is cooking. Reactions take place changing uncooked food into cooked food.