A sample of zinc corroded homogeneously in an aqueous solution, and the corrosion current density was   4.27 x 10-7A/cm2, What is the corrosion rate of zinc in mdd, given that M=65.38 g/mol

A galvanic cell Mn(s)|Mn2+(aq) || Pb2+(aq)|Pb(s) is constructed using a completely immersed Mn electrode that weighs 34.9 g and a Pb electrode immersed in 532 mL of 1.00 M Pb2+(ag) solution. A steady current of 0.0519 A is drawn from the cell as the electrons move from the Mn electrode to the Pb electrode. (a) Which reactant is the limiting reactant in this cell? Enter symbol (b) How long does it take for the cell to be completely discharged? (c) How much mass has the Pb electrode gained when the cell is completely discharged? g (d) What is the concentration of the Pb2+(aq) when the cell is completely discharged? (Assume that the limiting reactant is 100% reacted.) M

The same cell was used to study 0.100 M NH4CI (ag), and the measured resistance was 28.50 ohms. Calculate the molar conductivity of NH4CI(aq) at this concentration!

How long would it take to electrodeposit all the Cu2+ in 0.200 L of 0.210 M CuSO4 solution with an applied potential difference of 0.255 V and a current of 3.10 amperes? Enter your answer in minutes.