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Which of the following describes a compound?

A.
a piece of pure carbon, containing only carbon atoms
B.
oxygen gas surrounding a solid piece of carbon
C.
a substance made of two oxygen atoms for each carbon atom
D.
carbon and oxygen atoms mixed without being bonded together

User Martin Eve
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Answer:

Step-by-step explanation:

D.

carbon and oxygen atoms mixed without being bonded together

User Matt Gilman
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