When iron rusts and forms iron oxide, the iron oxide has more mass than the iron. Which statement correctly explains this difference in mass?(1 point)
Responses
Iron oxide has oxygen atoms, and pure iron does not.
Iron oxide has oxygen atoms, and pure iron does not.
The iron atoms in iron oxide have more mass than pure iron.
The iron atoms in iron oxide have more mass than pure iron.
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.
There are more iron atoms in iron oxide than in pure iron.
1 answer
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 reacts with oxygen from the environment to form iron oxide (rust). The addition of oxygen atoms increases the total mass of the resulting compound compared to the pure iron that was present before rusting.
