Which best identifies why the rusting of an iron nail in the presence of water and oxygen is an oxidation-reduction reaction

In redox reactions, the electrons are transferred.

Explanation:

Redox reaction is defined as the reaction in which oxidation and reduction reaction occur simultaneously.

Oxidation reaction is defined as the chemical reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.

Reduction reaction is defined as the chemical reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

Electrons are transferred from one atom to another in this type of reaction.

The chemical reaction for rusting of iron follows the equation:

Oxidation half reaction:  

Reduction half reaction:  

From the above reactions, the electrons get transferred from iron to oxygen. Thus, it is an redox reaction.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

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