It means that the ratio of the masses of the elements in a compound remains constant regardless of the source or method of preparation. For example, in water, the ratio of hydrogen to oxygen is always 1:8 by mass.
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It means that the ratio of the masses of the elements in a compound remains constant regardless of the source or method of preparation. For example, in water, the ratio of hydrogen to oxygen is always 1:8 by mass.
The statement means that compounds always contain the same proportions of elements by mass. Regardless of the sample’s size or origin, the ratio of elements within a compound remains constant, reflecting the fixed composition dictated by chemical bonding.