In a galvanic cell, the oxidation and reduction of metals occurs at the electrodes. There are two electrodes in a very cell, one in each half-cell. The cathode is where reduction takes place and oxidation takes place at the anode.
Yes It does exist.
CaCl2+CO2+H20----> CaCO3 + 2HCl
<span>CaCl2 reacts with water to form CaO an then CaO reacts with CO2 to form CaCO3.</span>
C. All of the missing mass has been converted into heat energy. It doesn’t affect the Law of Conservation of Mass because it uses Einstein’s law E=MC2