Amount of electricity that can deposit $108 \ g$ of silver from $AgNO_3$ solution is

During the electrolysis of concentrated $H_2SO_4$,perdisulphuric acid $(H_2S_2O_8)$ and $O_2$ are formed in equimolar amounts. The amount of $H_2$ that will be formed simultaneously is $(2H_2SO_4 \rightarrow H_2S_2O_8 + 2H^+ + 2e^-)$

How many electrons flow when a current of $5 \ A$ is passed through a cell for $200 \ s$?

Equal amounts of electricity are passed through two separate electrolytic cells containing nickel nitrate $[Ni(NO_3)_2]$ and chromium nitrate $[Cr(NO_3)_3]$. If $0.3 \ g$ of nickel is deposited in the first cell,how much chromium will be deposited in the second cell? (Atomic mass of $Ni = 59$,Atomic mass of $Cr = 52$)

The current flowing in a copper voltameter is $1.6 \ A$. The number of $Cu^{2+}$ ions deposited at the cathode per minute are

How many amperes must be passed through a Down's cell to produce sodium metal at a rate of $30.0 \ kg/h$?