A one-gram sample of radium 224 88 Ra (atomic mass 5
Chapter , Problem 42(choose chapter or problem)
A one-gram sample of radium 224 88 Ra (atomic mass 5 224.020 186 u, T1/2 5 3.66 days) contains 2.69 3 1021 nuclei and undergoes a decay to produce radon 220 86 Rn (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 3 104 J/kg. With the energy released in 3.66 days, how many kilograms of ice could be melted at 0 8C?
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