Answer :
Final answer:
The large flat sheet of iron will rust faster due to its larger surface area, impacting the rate of the chemical reaction.
Explanation:
The large flat sheet of iron will completely rust first compared to the small cube of iron. This is because the rate of a chemical reaction is influenced by the surface area of the reactants in contact with each other. The larger surface area of the flat sheet allows for a faster reaction compared to the cube due to more contact with the reacting substances.
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