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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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Tontin Tontin
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11 years ago
Animals obtain energy through a SERIES of chemical reactions in which sugar (C6 H12O6) and oxygen gas (O2) are reactants. This process produces water (H2O) and carbon dioxide (CO2) as waste products. How might use radioactive isotope to find out whether the oxygen in CO2 comes from sugar or oxygen gas?
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11 years ago
Since both CO2 and O2 are gases it might be another problem to separate them if you use radioactive O2.

If you use sugar that has radioactive oxygen in it, and you then detect radioactive oxygen in the CO2, you know for certain that it came from the sugar instead of the O2 since sugar does not decompose into O2 and something else.
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