An antiproton is identical to a proton except that it has negative charge. When a proton and an antiproton collide, they are annihilated and two photons are formed. In annihilation, all the mass of the particles is converted into energy.
a. Calculate the energy released in the reaction.
b. Calculate the energy released if 1 mole of protons and 1 mole of antiprotons were annihilated by this process.
(Mass of a proton = mass of an antiproton = 1.67 × 10⁻²⁷ kg.)