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"Which two chemical formulas obey the Law of Multiple Proportions:

a H₃​PO₄
b H₂SO₄
c HClO₄
d H₂SO₃​
e KHSO₄
f H₂S"

User Wovano
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Final answer:

The chemical formulas H₂SO₄ (sulfuric acid) and H₂SO₃ (sulfurous acid) obey the Law of Multiple Proportions because they consist of the same elements with the oxygen in differing whole number ratios.

Step-by-step explanation:

The Law of Multiple Proportions states that if two elements form more than one compound, then the ratios of the masses of the second element that combine with a fixed mass of the first element are ratios of small whole numbers. To determine which two chemical formulas obey this law, we have to find a pair of compounds that are composed of the same elements but with differing amounts. In the given options, sulfur and oxygen form two compounds: H2SO4 (sulfuric acid) and H2SO3 (sulfurous acid). These two compounds have the same amount of sulfur (one atom per molecule) but different amounts of oxygen; thus, the ratios of the masses of oxygen that combine with a fixed mass of sulfur are in whole numbers, demonstrating the Law of Multiple Proportions.

User Orlandster
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