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Stellar nuclear fusion begins with 1H and ends with 56Fe. Younger stars fuse hydrogen to form 4He, while older, more massive stars fuse helium to form heavier elements. Fusion beyond 56Fe is not possible because iron-­-56 has the greatest binding energy per nucleon. Calculate the binding energy per nucleon of 56Fe and use it to calculate the maximum total energy per mole of 56Fe that could be released through nuclear fusion. What percentage of the maximum total energy is released by the formation 4He?

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