Consider a process in which two gamma-ray photons are released when an electron and a positron are annihilated. [note that the mass of a positron is equal to that of an electron, and the gamma-ray photon has no mass.]
(a) what is the final energy of each photon (in j units)?
(b) what is the final energy of each photon (in kj/mol units)?
(c) what is the final energy of each photon (in ev units)?
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