In what year did French chemist Antoine Lavoisier describe the Law of Conservation of Matter?

• A. 1661
• B. 1789
• C. 1756
• D. 1803

Answer: (B)

Verified step by step guidance

1. Understand that the Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction, only transformed.
2. Recall that Antoine Lavoisier is known as the 'Father of Modern Chemistry' and was the first to clearly state and experimentally demonstrate this law.
3. Review historical timelines of chemistry to identify when Lavoisier published his key works related to this law.
4. Recognize that Lavoisier's major contributions, including the Law of Conservation of Matter, were published in the late 18th century.
5. Conclude that the year Lavoisier described the Law of Conservation of Matter is 1789.