Question

what was antoine lavoisiers contribution to the law of conservation of mass? he was the first person to write of it. he was the first person to propose it as a scientific law. he came up with a widely - used precise definition. he was the first person to perform a chemical reaction. which of the following describes a chemical reaction? oxygen interacts with iron to form rust. ice melts into water. carbon dioxide forms gas to make dry ice. rock splits apart over many years due to weathering.

Explanation:

1. For the first question about Lavoisier's contribution to the law of conservation of mass, Lavoisier was the first to propose it in a scientific way. He carried out precise chemical experiments and measurements, which laid the foundation for this fundamental law in chemistry.
2. For the second question about chemical reactions, when oxygen interacts with iron to form rust, it is a chemical reaction. A chemical reaction involves the formation of new substances with different chemical properties. Rust (iron - oxide) has different properties from iron and oxygen. Ice melting into water is a physical change (change of state), carbon - dioxide forming dry ice is also a physical change (sublimation in reverse), and a rock splitting over time due to weathering is a physical change related to mechanical and environmental factors.

Answer:

1. He was the first person to propose it in a scientific way.
2. Oxygen interacts with iron to form rust.