A sample of l-131 decays to 1.0 gram in 40.35 Days. What was the mass of the original sample? (half-life - 8.07 days) *
32 g
809
4.0 g
10 16g

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.

sup bro, im dumb, but this is what i found xd

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