Question

define a law of constant proportion
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Answer 1

Answer:

Law 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.

Answer 2

Answer:

The law of constant proportion defines that the sum of mass of the reactants is always equal to the mass of products.

For example: 1 gram of hydrogen + 8 grams of oxygen = 9 grams of water.