The following chemical equation shows the reaction in which
natural gas (methane or CH4) is burned.
Refer to this equation while answering the following questions.
![](pics/ch4.gif)
19. Refer to the equation above. Which of the molecules in
this reaction is a product of the decomposition of ancient organisms?
a) CH4
b) O2
c) CO2
d) H2O
--------------- [Answer]
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Slichter