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Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio.
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Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio.

User Lance McCarthy
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Okay, what is the question?
User Vasily Kabunov
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Identify each material as a compound or a mixture.

Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio.

The answer is compound
User Nafis Ahmad
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