I did not have the bond energies data table. The answer for the propanone question might be a bit off. The pages are out of order. I have spent enough time on this already.
Have you moodled yet?
I have completed my intended task. I hope that someone reads these puppies. It took me quite some time to get these things loaded up. Now if I could figure out symbols like 'delta' and superscripts and subscripts. [H2O just doesn't look right.]