A one gram sample of radium 224 over 88 Ra (atomic mass = 224.020186 u. T 1/2 = 3.66 days) includes 2.69 x 10 to the power of 21 nuclei and experiences a decay to generate random 220 over 86 Rn (atomic mass = 220.011 368 u ). The atomic mass of an a particle is around 4.002 603 u . With the energy released in 3.66 days determine amount in kilograms the ice could be melted at 0*C?