Question

When iron rusts and forms iron oxide, the iron oxide has more mass than the iron. Which statement correctly explains this difference in mass? Responses The iron atoms in iron oxide have more mass than pure iron. The iron atoms in iron oxide have more mass than pure iron. - no response given Iron oxide has oxygen atoms, and pure iron does not. Iron oxide has oxygen atoms, and pure iron does not. - no response given There are more iron atoms in iron oxide than in pure iron. There are more iron atoms in iron oxide than in pure iron. - no response given The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron. The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron. - no response given

Answer 1

The correct explanation for the difference in mass between iron and iron oxide is: **Iron oxide has oxygen atoms, and pure iron does not.**

When iron rusts, it reacts with oxygen in the environment to form iron oxide (commonly known as rust). The addition of oxygen atoms increases the overall mass of the compound compared to the original iron. Therefore, the presence of oxygen contributes to the greater mass of iron oxide compared to pure iron.