Gold has a half life of 7653yrs. how many years would it take for 200g sample to be reduced to 25g?

it would take 7653 years to go from 200 to 100

 then from 100 to 50 would be another 7653 years

then 50 to 25 would be another 7653 years

 so 7653 * 3 = 22,959 years total

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.