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? (1 point) iron oxide has oxygen atoms, and pure iron does not. 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. the iron atoms in iron oxide have more mass than pure iron.

Explanation:

When iron rusts to form iron - oxide, oxygen atoms combine with iron atoms. Iron - oxide has more mass than pure iron because of the addition of oxygen atoms. The iron atoms themselves do not change in mass during rusting. Each oxygen atom has a non - zero mass and contributes to the increased mass of iron - oxide.

Answer:

The oxygen atoms in iron oxide have more mass than the iron atoms in pure iron.