Question

State the law of definite proportion or constant composition

Answer 1

Answer:

Explanation:

According to this law a chemical compound always contain same element combined together in a fixed porportion by mass irrespective of the source from which it is obtained or prepared.

Answer 2

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The law of constant proportions states that chemical compounds are made up of elements that are present in a fixed ratio by mass.

For example, in a nitrogen dioxide (NO2) molecule, the ratio of the number of nitrogen and oxygen atoms is 1:2 but the mass ratio is 14:32 (or 7:16)