A nuclear reactor is fuelled by fission of uranium. The output from the reactor is 200 MW. The following equation describes a typical fission reaction:

²³⁵₉₂U + ¹₀ n → ²³⁶₉₂U  → ⁸⁷₃₅Br + ¹⁴⁶₅₇La + 3¹₀n

a. State and explain into what form the majority of the energy released in the reaction is transformed.
b. i. Calculate the energy released in the reaction. The kinetic energy of the captured neutron is negligible.
ii. Assume that the energy released in this fission is typical of all fissions of U-236. Calculate how many fissions occur each second.
iii. Calculate the mass of uranium-235 that is required to run the reactor for 1 year.
(Mass of ²³⁵₉₂U  = 3.90 × 10⁻²⁵ kg, mass of ⁸⁷₃₅Br = 1.44 × 10⁻²⁵ kg, mass of ¹⁴⁶₅₇La = 2.42 × 10⁻²⁵ kg, mass of neutron = 1.67 × 10⁻²⁷ kg, 1 year = 3.15 × 10⁷ s, molar mass of uranium-235 = 235 g mol⁻¹.)