Which phrase describes a specific compound?

A. Can contain only one element
B. Can be physically separated into elements
C. Is composed of elements chemically combined in a definite ratio
D. Is composed of elements mixed in proportions that can vary



Answer :

Final answer:

A compound is a substance composed of two or more elements chemically combined in a fixed ratio.


Explanation:

A compound is composed of two or more elements chemically combined in a fixed ratio. For example, methane always has four times more hydrogen particles compared to carbon particles, demonstrating a consistent composition. This distinguishes compounds from mixtures, as compounds have a specific and unchanging elemental ratio.


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