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What is the balanced chemical equation for C8H18+O2 = CO2+H2O?
##2 C_8H_18 + 25 O_2= 16 CO_2 + 18 H_2O##
Use this website to balance diffcult chemical reactions, but don't grow too dependent upon it because you will be tested over this stuff and won't have the website available.
Always try and balance the species that is least apparent on both sides and go from there. When you fail, try and try again!