Wednesday, July 13, 2011

C.7-C.11

13. a.6
b.5
c.5

14.a 2.4
b.621g
c.28g
d.Help!

15.Because Oxygen weighs much more than carbon

16.a87%
b.53%
c.40%

17.
a.67%
b.98%
c.67%
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