What are the advantages and disadvantages of rusting
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The rusting of iron is more of a disadvantage than an advantage. Rusting forms an iron oxide which is more brittle than the iron. It less resistance to environmental degradation and permeability by water and air, therefore cannot be used for coating.

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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.

explanation:

0.07 g/cm³

1.37 g/cm³