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posted by jacque Friday, January 25, 2013 at 9:51am.
balance the equation c2h4(g)+o2(g)---c(s)+h2o
1 C2H4(g) + 3 O2(g) ---> 2 CO2(g) + 2 H2O(g) 0.821 moles C2H4 x (3 moles O2 / 1 mole C2H4) = 2.46 moles O2 Therefore, the answer is 3
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