Posted by steph on Thursday, September 8, 2011 at 11:13pm.
If you want to lose 1 pound of "fat," which is 20% water, how many kilocalories do you need to expend?
i don't know where to start :(
Please Help!!!

Chemistry  DrBob222, Friday, September 9, 2011 at 12:37am
One pound = 454 grams. Subtract 20% fat to give 45420%of 454 = about 363 grams.
I understand that fat calories = about 9 kcal/g therefore,
363 grams x 9 kcal/g = ?? kcal. This is approximate and you need to go through the steps a little more accurately. Also, the 9 kcal/g is my memory; you should confirm that number and use a different number if appropriate.
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