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# burning one metric ton (1000 kg) of coal can yield an energy of 3.30 × 10e10 j. fission of one nucleus of uranium-235 yields an average of ?

approximately 200 mev. what mass of uranium produces the same energy in fission as burning one metric ton of coal?

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- Anonymous7 months agoFavourite answer
1 Mev = 1.6*10^-13 joule

200 mev = 3.2*10^-11 joule

nucleus mass = 1.674*10^-27*235 = 3.93*10^-25 kg

3.30*10^10 / 3.2*10^-11 joule ≅ 1.03*10^21 nuclei

1.03*10^21 nuclei * 3.93*10^-25 kg /nucleus = 4.0*10^-4 kg = 0.4 grams

mass ratio K = 1*10^6/0.4 = 2.5*10^6

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