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23 October, 14:49

I am a substance called carbon dioxide. You breathe me out! My chemical formula is CO2 - what am I?

A. an element

B. a compound

C. a mixture

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Answers (2)
  1. 23 October, 15:03
    0
    You are a compound i think
  2. 23 October, 16:09
    0
    B compound carbon (C) and two oxygen (O) is CO2
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