Question

15 POINTS!!!!!!

Answer 1

Important discoveries from  Lavoisier who changed the field of chemistry in the late 1700s

• 1. periodic system
• 2. the discovery of oxygen
• 3. the law of conservation of mass
• 4. the importance of weighing

Further explanation

There are several important discoveries from Antoine Laurent Lavoisier who changed the field of chemistry in the late 1700s

The findings include:

• 1. he discovered the naming of the chemical periodic system for the first time on which the naming of the modern periodic system was based
• 2. He put forward the term "oxygen" and stated that air consists of two components namely nitrogen and oxygen.
• And oxygen is what plays an important role in the combustion process of a substance
• 3. He stated the law of conservation of mass.

Experiments carried out by reacting oxygen and mercury in a closed system and produce mercury oxide

And if it is heated it will again produce the same amount of oxygen and mercury

From this experiment, he stated the law that:

In a closed system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.

• 4. Lavoisier's precision in the importance of the weighing process in chemical reactions causes an important basis in the calculation of chemistry for the progress of research in the future

Learn more

Law of conservation of mass https://brainly.in/question/4830694

application of mass conservation law brainly.com/question/6677869

the law of conservation of matter

brainly.com/question/12733091

Keywords: mass, closed system, Lavoisier, combustion, periodic system

Answer 2

He proposed the Law of Conservation of Matter, being the first to say that matter can not be created nor destroyed.