Chemistry
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Compounds are substances in which two or more atoms are chemically combined to form a new, pure substance. Which of the following substances is NOT a compound? A. H20 (water) B. CO2 (carbon dioxide) C. NH3 (Ammonia) D. H2 (hydrogen)

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(2) Answers
AuntLope

The answer is D Hope I helped! 

Marmar11

D hope that also helped

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