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41 votes
41 votes
Which choice is a compound?

Question 3 options:

carbon dioxide (CO2 )


carbon (C)


air (N2, O2 mixed with CO2)


oxygen (O2)

User Nobleknight
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2 Answers

25 votes
25 votes
carbon dioxide (CO2)
User Language Lassi
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5 votes
5 votes

Answer:

carbon dioxide (CO2 )

User Matteo Rulli
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