During gas chromatography you observe three peaks. these peaks have measured areas of 24 cm2, 76 cm2, and 36 cm2, respectively in the order. what is the percent composition of isopentyl acetate in your sample? you need to know which peak is your isopentyl acetate first! keep 3 sig figs. report as percentage but leave "%" : one peak is actually due to your solvent acetone used in washing the syringe. it should not be included in your % composition calculation. you need to know which peak is due to acetone as well.