Find the energy equivalent of one atomic mass unit, first in Joules and then in MeV. Using this, express the mass defect of16 8O in MeV/c2.

I amu=1.66×1027 kg c = speed of light = 3×108 m/sE = mc2E= 1.66×1027× 3×1082E = 1.49×10-10 joule1 MeV= 1.6×10-13 JE =  1.49×10-101.6×10-13= 931.6 MeVO168mass no = 16energy for 16 amu = 16×931.6 = 14905.6 MeVmass defect = energyc2 = 14905.6 MeV/c2

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