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Which law compares the different compounds \(H_2O\) and \(H_2O_2\) made from hydrogen and oxygen?

Answer and explanation

Correct answer: Law of multiple proportions

The law of multiple proportions compares different compounds made from the same two elements. If the amount of one element is fixed, the different masses of the second element that combine with it show a simple whole-number ratio. This idea is different from the law of definite proportions, which describes the constant composition of one compound.

Water, \(H_2O\), and hydrogen peroxide, \(H_2O_2\), both contain hydrogen and oxygen, but their formulas and compositions differ. For a fixed amount of hydrogen, the oxygen combined in the two compounds is in the ratio \(1:2\). Thus these compounds illustrate the law of multiple proportions, making option B correct.

Related tags

ChemistryLaws-Of-Chemical-CombinationClass-11

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