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Which law states that a pure compound always has the same composition by mass, regardless of its source or preparation?

Answer and explanation

Correct answer: Law of definite proportions

The law of definite proportions states that a pure compound contains the same elements in a fixed ratio by mass, whatever its source or method of preparation. Therefore, its percentage composition by mass is constant.

Related tags

ChemistryLaws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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