C2H3 is the vinyl functional side chain attached to a larger molecule.
CH2=CH-
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3 + h = 3 + 100.25 = 103.25
(2h-3)(h+1) = 0 h = 3/2 or h = -1
15
-1
12 - h = -h + 3 Collect like terms giving 12 - 3 = -h + h ie 9 = 0 Something wrong somewhere!