For 10 points, name this French scientist who developed the law of conservation of mass, often considered the father of modern chemistry.
This scientist theorized that solids combine with "caloric" to form liquids, and he also showed respiration to be a type of combustion. He theorized that all acids must contain oxygen, and his research showed that weight changes during combustion arise from mixing with oxygen, disproving the phlogiston theory. This author of Elementary Treatise on Chemistry also named the element hydrogen. For 10 points, name this French scientist who developed the law of conservation of mass, often considered the father of modern chemistry.
This scientist theorized that solids combine with "caloric" to form liquids, and he also showed respiration to be a type of combustion.
Antoine-Laurent Lavoisier