Which of the following best describes compounds?

A. They can only be separated chemically.
B. They are always liquid at room temperature.
C. They consist of two or more elements.
D. They have a fixed composition.



Answer :

Final answer:

A compound is composed of two or more elements in a fixed ratio, distinct from elements. Substances can be classified as compounds, heterogeneous mixtures, or homogeneous mixtures based on their composition and uniformity.


Explanation:

A compound is composed of two or more elements combined in a fixed ratio, distinct from elements which are the simplest chemical substances.

Substances can be classified as either chemically pure compounds, heterogeneous mixtures, or homogeneous mixtures based on their composition and uniformity throughout.

If a substance can be separated into its elements, it is classified as a compound.


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