In a rush, a student only measured the mass of the empty beaker once before beginning the experiment and one more time after the entire experiment was finished. The mass of
the empty beaker was found to be 0.123g less at the end of the experiment. What
happened?

The student measured the cup and got an incorrect answer

Explanation:

because he was in a rush.

did anyone actually do this? like if anyone has submitted this i rly need .

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.