The average energy output of a good grade of coal is 2.6 × 10⁷ kJ/ton. Fission of 1 mol of ²³⁵U releases 2.1 × 10¹⁰ kJ. Find the number of tons of coal needed to produce the same energy as 1 lb of ²³⁵U. (See Appendix C for conversion factors.)

Data given in Appendix C

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TABLE 3 Some Common Abbreviations and Standard Symbols Abbreviation Term Activation energy Ampere Aqueous solution Atmosphere, unit of pressure Atomic mass unit Avogadro's constant Bar, unit of pressure Body-centered cubic Bohr radius Boiling point Celsius temperature Charge number of an ion Coulomb, electric charge Curie, radioactivity Cycles per second, hertz Debye, unit of electric dipole Electron Electron volt Electronegativity Energy Enthalpy E₂ A aq atm u N bar bcc a bp °C Z C Ci Hz D e eV XEH Term Entropy Standard entropy Entropy change for reaction Equilibrium constant Concentration basis Pressure basis lonization weak acid lonization weak base Solubility product Formation constant Ethylenediamine Face-centered cubic Faraday constant Gas constant Gibbs free energy Standard free energy Standard free energy of formation Standard free energy change for reaction Half-life Heat Hertz Abbreviation S Sº 4,Sº K K Kp K₂ Kb Ksp K₁ en fcc F R G Gº A,Gº A,Gº tuz 9 Hz