A one-gram sample of radium 224 86 Ra (atomic mass = 224.020 186 u, T 1/2 =
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A one-gram sample of radium 22486Ra (atomic mass = 224.020 186 u, T1/2 = 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?
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The heat Q needed to melt a mass m of ice is given by Q mLf Equation 125 where L f 335 10 4 Jkg is t...View the full answer
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