Please help with the following chemistry questions with explanation:   1) The interior and exterior of a nerve cell behave as a concentration cell

Please help with the following chemistry questions with explanation:

1) The interior and exterior of a nerve cell behave as a concentration cell. If the concentration of K⁺ outside the cell is 0.045 M and the concentration inside is 0.45M, what is the potential difference (in V) across the cell membrane? Assume normal body temperature , T = 37^oC and a one-electron transfer (z = 1)

  a) 0.111

  b) 0.0615

  c) 0.583

  d) 0.0167

  e) 0.298

2) What is the equilibrium constant for the reaction taking place in an electrochemical cell based on I₂/2I^- and Pb²⁺/Pb for which E^o_cell = +0.66V at 298K?

    a) 2.0 x 10²²

    b) 7.2 x 10⁴

    c) 5.1 x 10^-3

    d) 56

    e) 6.3 x 10¹²

3) When the following redox reaction is balanced in basic solution, what is the coefficient in front of hydroxide?

 Fe³⁺(aq) + OCl^- (aq) ---> FeO₄^2-(g) + Cl^- (aq)

   a) 1

   b) 3

   c) 6

   d) 10

   e) 12