Question

Antoine lavoisier is credited with the discovery of the law of conservation of mass. the law states that in a chemical reaction, matter is not created or destroyed but preserved. which equation correctly models this law?
h2 + cl2 ---> 2hcl

h2 + cl2 ---> hcl

h + cl ---> 2hcl

2h2 + cl2 ---> 2hcl2

Answer 1

The Antoine's law means that the amount of substance before reaction must be equal the amount of substance after reaction

The equation h2 + cl2 ---> 2hcl correctly models this law.