Question

When iron rusts and forms iron oxide the iron oxide has more mass than the iron,which statement correctly explains this diffrence
in mass?
1 point)

Answer 1

When iron rusts and forms iron oxide, the increase in mass is due to the fact that iron reacts with oxygen from the environment. This reaction combines the iron atoms with oxygen atoms, resulting in iron oxide (Fe2O3 or Fe3O4, depending on the form of rust). The additional mass comes from the oxygen that is added during the rusting process. Therefore, the correct explanation would be that the mass of the rusted iron is greater because it includes the mass of the oxygen that has combined with the iron to form iron oxide.