A one-gram sample of radium ²²⁴₈₆Ra (atomic mass = 224.020 186 u, T_1/2 = 3.66 days) contains 2.69 3 1021 nuclei and undergoes a decay to produce radon ²²⁰₈₆Rn (atomic mass 5 220.011 368 u). The atomic mass of an a particle is 4.002 603 u. The latent heat of fusion for water is 33.5 × 10⁴ J/kg. With the energy released in 3.66 days, how many kilograms of ice could be melted at 0 8C?

Transcribed Image Text:

Ra