Lengths. Practice Exercise 1
Hypothetical elements X and Y form a molecule XYz, in
which both Y atoms are bonded to atom X (and not to one
another). The X-X distance in the elemental form of X is
2.04 Å, and the Y-Y distance in elemental Y is 1.68 Å. What
would you predict for the X-Y distance in the XY2 molecule?
(a) 0.84 Å (b) 1.02 Å (c) 1.86 Å (d) 2.70 Å (e) 3.72 Å

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.