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22 votes
22 votes
5. When you breathe, your lungs absorb oxygen

and release carbon dioxide. Which of these are
your lungs releasing?
(1) O
(2) O2
(3) CO
(4) CO2
(5) NH3

User Mike Pateras
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1 Answer

10 votes
10 votes
4 CO2 two atoms of oxygen combine with 1 atom of carbon and that’s CO2
User Abdullah Razzaki
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