You need to know how to do this; therefore, please tell me what trouble you're having. I expect you know more about this than you think.
Here is a site to show you how to do oxidation states.
http://www.chemteam.info/Redox/Redox-Rules.html
C3H8 + 5O2 --> 3CO2 + 4H2O what are the oxidation #'s of each? What is being oxidized? reduced? Please explain
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