Hey, I got a question here that asks for the complete combustion of ehtene, C2H4. I assume this means the reaction of ethene with oxygen? Thus, the equation would look something like this: C2H4 + O2 --> C02 + H2O Yes? But the question also asks me to balance the equation, if the reaction is correct then I'm having a little bit of trouble finding the proper balance for the equation. The course I am taking allows you to use fractions to balance reactions (ie 1/2). Is it possible to use both fractions and whole numbers to balance?