Pretty sure that the energy stored in chemical bonds is ATP, so probably the mitochondria? idk if thats what you are asking<span />
The particular reaction that represents the oxidation of Mg metal would be the following:
Mg => Mg+2 + 2e-
This is the half reaction of the oxidation of the magnesium metal, another charged species would need to receive it to become reduced or gain the 2 electrons lost.
Answer for this question might be number 2
Answer:

Explanation:
Hello!
In this case, since the problem is providing mass, energy, and specific heat of water, we can write the following equation that relates them to each other:

In such a way, we get rid of both m and C, to solve for the change in temperature:

Now we plug in the data to obtain:

Best regards!
Standard Temperature and Pressure (STP) is 0 degree Celsius and 1 atm. We also know that 1atm= 101.3 kPa. Thus, set 3 is the best choice.
Hope that would help :))