The law of constant composition says .
A) that all substances have the same composition
B) that the composition of a compound is always the same
C) that the composition of a heterogeneous mixture is always the same
D) that the composition of a homogeneous mixture is always the same
E) that the composition of an element is always the same

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Quizplus · Accepted Answer

The law of constant composition, also known as the law of definite proportions, states that a given compound always contains exactly the same proportion of elements by mass. In other words, the composition of a compound is always the same, regardless of its origin or method of preparation. This law is fundamental to the study of chemistry and has been verified by countless experiments and observations.

The Law of Constant Composition Says