1 янв 1794 г. - Joseph Louis Proust
Описание:
Joseph Louis Proust was a French chemist who created the Law of Definite Proportions. This law states that a chemical compound will always have its base elements in a fixed ratio no matter the source or method of preparation. This law by Proust is now the principal of anylitical chemistry.Добавлено на ленту времени:
Дата:
1 янв 1794 г.
Сейчас
~ 232 г назад