5.51 Determine the molecularity and write the rate law for each of the following elementary steps:
(a) X - products
(b) X + Y products
(C) X + Y +Z — products
(d) X + X - products
(e) X + 2Y products
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answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.