Calculate the molar mass (atomic weight) of naturally occurring uranium from the masses of the two major isotopes of uranium ( ²³⁵U = 235.0409; ²³⁸U=238,0508) and their natural abundances

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Iris MandiaLv9

29 Nov 2020

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A reactor is fueled with 4.000kg of uranium enriched to 20.0 atom-percent (0.2 mole fraction) in ²³⁵U, the rest being ²³⁸U. The fuel has a mass density of 19.2 g/cm³. Calculate: (a) The mass of ²³⁵U (b) The atomic number densities (# of atoms/cm³) of ²³⁵U and ²³⁸U

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