Unfortunately, the equation you submitted is incorrect, as there are no compounds with the formulas Hg3Ni2, Hg2Ni2 or Ni2. Therefore, we are unable to provide detailed information, reaction conditions and processes, as well as the phenomena that occur.
Essentially, a chemical equation is a description of the transformation of substances into new products. Reaction conditions may include temperature, pressure, and depend on the specific reaction mechanism. The reaction process usually involves the decomposition or combination of molecules to form new products.
We apologize for the inconvenience. If you have another chemical equation, please submit it and we will provide the information you need.