What are the contribution of the chemistry?

Answer 1

All medicines, plastics, some metals that are not found pure in nature, batteries, explosives, synthetic foods, pesticides and herbicides, and fuels are all developed through chemistry.
Chemistry is the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.

If you're asking what is its contribution to the world, then its the many materials and substance we've managed to make and learn how to use from the gasoline in your car to the artificial flavors in your food.
Immensely numerous. From the fertilizers for growing plants, to the soaps and shampoos in your hair, to the medicines and lotions in a drug store, to even the keys and circuitry of your computer, much of the world has benefited from the study of chemistry. However, the flip side has also produced some of the worlds worst weapons and methods of death.

Answer 2

100 years