حفظ الكتلة - المعرفة
حفظ الكتلة. Russian scientist ميخائيل لومونوسوف discovered the law of mass conservation in 1756 by experiments, and came to the conclusion that phlogiston theory is incorrect. أنطوان لافوازييه 's discovery of the Law of Conservation of Mass led to many new findings in the 19th century. Joseph Proust 's ...