combustion. fixed proportions. conservation of mass. conservation of energy.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In the late 1700s, Antoine Lavoisier performed a series of experiments to find out what happened when a substance burned. In each experiment, he observed that the weight of a container and its contents was the same at the end of the experiment as it had been in the beginning. These observations led him to propose the law of
Possibilities:
- combustion.
- fixed proportions.
- conservation of mass.
- conservation of energy.

conservation of mass.