Question

An old iron battery was discarded in this meadow. As time passes, the iron begins to undergo a chemical change when the iron reacts with the oxygen in the air. The evidence that a chemical change has occurred in this example is that
A) rusting releases a gas.
B) rusting produces water.
C) rusting produces a new substance.
D) none of these changes are occurring.
I need a correct answer plz!

Answer 1

Its C. When rust forms on iron, the iron atoms combine with oxygen atoms in the air to form a new substance that is made of both iron and oxygen. Hope this helps!