When iron rusts and forms iron oxide, the iron oxide has more mass than the iron. Which statement

Question

correctly explains this difference in mass?(1 point)
The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron.
The iron atoms in iron oxide have more mass than pure iron.
There are more iron atoms in iron oxide than in pure iron.
Iron oxide has oxygen atoms, and pure iron does not.

Answer 1

The correct statement that explains the difference in mass when iron rusts and forms iron oxide is:

"Iron oxide has oxygen atoms, and pure iron does not."

When iron rusts, it combines with oxygen from the environment, which adds mass to the resulting iron oxide compared to the original pure iron.