Consider the equations below. H2 -> 2H
C2H4+H -> C2H5
C2H5+H -> C2H6
When these equations are added together, what will the overall equation be?
1. C2H4+H2 -> C2H6
2. H2+C2H4+2H+C2H5+ -> 2H+C2H5+C2H6
3. C2H4+C2H5+H2 -> C2H5+C2H6

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