Answer: The product of the given reaction is
and the solution at equilibrium will be acidic.
Explanation:
When two or more chemical substances react together then it forms new substances and these new substances are called products.
For example, 
This shows that nitric acid
is the product formed and it is an acidic substance.
Hence, the solution at equilibrium will be acidic in nature.
Thus, we can conclude that the product of the given reaction is
and the solution at equilibrium will be acidic.
Answer: The average kinetic energy of the gas particles is greater in container B because it has a higher temperature.
Answer:
You will be able to watch the slow dissolution of the nail (probably a steel nail and not iron) and the change in colour of the solution.
Explanation:
I believe not 100% sure.