Suppose you and your colleagues are tasked to perform a combustion analysis of 0.117g of an unknown compound whose empirical formula and molar mass are CH2O and 180.15 g/mol respectively. When you analyze the mass of carbon dioxide produced during the reaction, you realize that something is wrong because you found 0.517g of carbon dioxide. Analysis of water resulting from the reaction also reveals unexpected results (0.229 g of H2O). One of your colleagues then mentions that he may have mistakenly contaminated the sample with a little bit of octane when he was transferring the weighted sample into the combustion chamber.
Based on your results, how much octane was in the original sample?