Posted by lisa on Saturday, September 5, 2009 at 6:19am.
First of all, it looks like you just listed all your homework questions here with out ANY effort on your part. Any GOOGLE Search will help you, if you don't have a good textbook:
http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla:en-US:official&hs=4ib&ei=LnGiSpbyJYvIMJ7b2NYP&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=chemical+that+nourishes+the+body&spell=1
Sra
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