More water vapour than Garbon dioxide

摘要

Your recent Global Warming essay (Publisher's Letter, June 2009) is interesting but you will need to revise your basic stoichiometry if you are to pass this year's HSC Chemistry exam.You did correctly balance your equation but if you burn two moles (228 grams) of octane with 25 moles (800 grams) of oxygen and "calculate the molecular weights" as you were taught in your chemistry class you would have correctly shown that 704 grams of CO2 and 324 grams H2O would be produced.