The answer is .......
<span>A.Nitrogen from the atmosphere is used and replaced directly by plants on the surface.
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Answer:
as the products of that reaction
Explanation:
Reduction <span>always results in a lowering of the oxidation number. The reaction of the system above is written as:
</span><span>Cu2+(aq) + Fe(s) --> Cu(s) + Fe2+(aq)
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From the reaction, we see that copper goes from the +2 to a neutral charge. Lowering of the oxidation number happens so this is the element that is being reduced.