The law of constant composition states that ________ A)compounds such as NO₂and SO₂ have identical chemical properties. B)the elements forming a particular compound always combine in the same proportions. C)nitrogen and oxygen can combine to form NO or NO₂. D)compounds such as NO and NO₂have identical chemical properties. E)only one compound can be produced when two elements combine.

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The law of constant composition states that the elements forming a particular compound always combine in the same proportions. This means that a specific compound will have a fixed ratio of atoms of different elements. Hence, the composition of a compound is always constant regardless of its source or method of preparation.

The Law of Constant Composition States That ________