<P> In chemistry , the law of definite proportion , sometimes called Proust 's law or the law of definite composition , or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio ( by mass ) and does not depend on its source and method of preparation . For example , oxygen makes up about / of the mass of any sample of pure water , while hydrogen makes up the remaining / of the mass . Along with the law of multiple proportions , the law of definite proportions forms the basis of stoichiometry . </P>
<P> In chemistry , the law of definite proportion , sometimes called Proust 's law or the law of definite composition , or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio ( by mass ) and does not depend on its source and method of preparation . For example , oxygen makes up about / of the mass of any sample of pure water , while hydrogen makes up the remaining / of the mass . Along with the law of multiple proportions , the law of definite proportions forms the basis of stoichiometry . </P>
what does the law of definite proportions state
what does the law of definite proportions state
a given chemical compound always contains its component elements in fixed ratio ( by mass ) and does not depend on its source and method of preparation
a given chemical compound always contains its component elements in fixed ratio ( by mass ) and does not depend on its source and method of preparation