Which part of the electrochemical cell is made up of a fluid or gel with many ionsthe anodethe cathode the electrolytethe voltmeter?

The answer is C. The electrolyte. It consists of a gel with many mobile ions that are responsible for the transfer of charge between the electrodes in the electrochemical cell. The gel comprises of both positive and negative ions that are responsible for the transfer of the different charges.

C) the increase in atmospheric pressure pushes the walls of the balloon outward thus making it  is the answer.hope i you.

Oxygen= 88ghydrogen= 12g