Plutonium-239 has been used as a power source for heart pacemakers. What is the energy obtained from the following decay of 215mg of plutonium-239?
239/94Pu --> 4/2He +235/92U
suppose the electric energy produced from this amount of plutonium-239 is 25% of this value. what is the minimum grams of zinc that would be needed for the standard voltaic cell Zn/Zn2+//Cu2+/Cu to obtain the same electric energy?