50.0 grams of radium-233 has a half-life of 30.0 seconds. How many grams of radium-233 would remain after 3.00 minutes? (Answer with numbers only. 3 significant figures. No units.

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.

i think its 100.

hope this !