Iron and oxygen form rust. compare the mass of iron and oxygen before the reaction with the mass of rust resulting from the reaction.

Conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.

Explanation:

Mass is always conserved, so the total mass of iron and oxygen gas consumed at the beginning of the reaction is equal to the mass of rust generated at the end of the reaction.

i think its 5049.

i hope this !