Which describes the current model of the atom?
a. it can be used to predict atomic behavior in most circumstances.
b. it has been perfected and will never be changed in the future.
c. it is only accepted by a small fraction of scientists.
d. it is only useful in very specific circumstances.

A.it can be used to predict atomic behavior in most circumstances.

Explanation:

a. 2.041 V

b. 2.116 V

c. 2.043 V

Explanation:

a.

In an electrochemical cell;

reduction occurs at the cathode & oxidation at the anode.

Thus, from the question; reduction at cathode=

→

Oxidation at anode;

 →  

The net process in the Cell is obtained by the algebraic sum of the two half-cell reactions:

Overall reaction:

 →  

= 1.685V  -   (- 0.356V)

= 2.041V

b.      

To determine the initial value of E-cell :

In the electrochemical cell; both the anode and the cathode were submerged into 4.30M of Sulfuric acid; therefore:

→    

Assuming:

  such that (;)     = 4.30M

let  : a=   & b=  

=  

 -   ×  log  

=2.041V -    ×  log  

= 2.041V  -  0.02955  ×  log  

= 2.041V  -  0.02955  ×  log  

= 2.041V  -  0.02955  ×  (-2.5339)

= 2.041V   +  0.075V

=2.116V

c.

If concentration of is dropped by 76.00%

 =  4.30M

= 4.30M  -  4.30M  

= 1.032M

 =  2.041V -    ×  log  

=2.041V  -  0.02955  ×  log  

=2.041V  -  0.02955  ×  log  (0.88161954735)

=2.041V  -  0.02955  (- 0.0547)

=2.041V  +   (0.0020)

= 2.043V