The standard reduction potentials at 298 K for single electrodes are given below.

Electrode	Electrode potential (volt)
Mg2+ /Mg	-2.34
Zn2+ /Zn	-0.76
Fe2+ /Fe	-0.44

From this we can infer that

A. $$2.303\frac{{RT}}{F}$$ B. $$ - 2.303\frac{{RT}}{F}$$ C. $$E_{{M^ + }|m}^ \circ + 2.303\frac{{RT}}{F}$$ D. $$E_{{M^ + }|m}^ \circ - 2.303\frac{{RT}}{F}$$

A. 1.101 B. 1.007 C. 0.998 D. 0.898

A. 0.76V B. -0.40 V C. -0.76 V D. 0.40 V

A. decrease by a factor of 2 B. increase by a factor of 2 C. decrease by a factor of 4 D. increase by a factor of 4