One possible mechanism for the decomposition of ethane, C2H&, into ethylene, C2H4, and hydrogen, C2H6 - C2H4 + H2 includes the following steps. (1) C2H6 - 2CH3• (2) CH3• + C2H6 – CH4 + C2H5• (3) C2H5• - C2H4 + H• (4) H• + C2Hg -C2H5• + H2 (5) H• +C2H5•C2H6 (a) Which step(s) initiate the reaction? O Step (2) O tep (5) O Step (4) O Step (1) O Step (3)

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