What is another word for law of equivalent proportions?
Pronunciation: [lˈɔː ɒv ɪkwˈɪvələnt pɹəpˈɔːʃənz] (IPA) 
The law of equivalent proportions, also known as the law of definite proportions, is a fundamental principle in chemistry. It states that the elements in any compound always occur in fixed, definite proportions. The law is sometimes referred to as the law of constant composition or the law of definite composition. Another synonym for the law of equivalent proportions is the law of stoichiometry, which is essentially the mathematical expression of the law. It is also known as Proust's law, after the French chemist Joseph Louis Proust, who first proposed the principle in the late 18th century. Overall, these synonyms all refer to the same concept and underline the importance of understanding the fixed ratios of elements in chemical compounds.
