Final answer:
Chemical properties can only be observed by changing a substance into a different one, showcasing the substance's ability to undergo specific chemical changes.
Explanation:
Chemical properties are the type of property that can be observed only by changing a substance into a different substance. These properties describe the ability of a substance to undergo specific chemical changes, resulting in the formation of new types of matter.
For example, when iron rusts, it undergoes a chemical change, forming rust, which is different from the original iron. This is a clear demonstration of a chemical property that can only be observed through such changes.
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