For the concentration cell, M|M⁺ (aq, 0.01 mol/dm³)| |M⁺ (aq), 0.1 mol/dm³|M the EMF (E) of the cell at a temperature (T) equals

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