Question

state the law of constant proportions
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Answer 1

Answer:

Law of constant proportion states that a chemical compound always contains exactly the same proportion of elements by mass. For a given unique chemical compound, its elemental composition is same for any sample that exists. ... If we take some mass of water, 8/9 of its mass will be oxygen and 1/9 will be hydrogen.

Answer 2

The law states that in a chemical substances the elements are always present in a definite proportion by mass. It is also termed as law of Constant proportion.

OR

Law of constant proportion states that, “a pure chemical compound always consists of the same elements that are combined together in a fixed (or definite) proportion by mass”.