Question

define a law of constant proportion
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Answer 1

Answer:

Laws of constant proportion. Laws of constant proportion. 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 definite proportion.

Explanation:

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Answer 2

Answer:

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).

Explanation:

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