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Gallium has an orthorhombic structure, with a=0.45258nm,b=0.45186nm, and c=0.76570nm. The atomic radius is 0.1218nm. The density is 5.904g/cm33 and the atomic weight is 69.72g/mol. Avogadro's

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Gallium has an orthorhombic structure, with a=0.45258nm,b=0.45186nm, and c=0.76570nm. The atomic radius is 0.1218nm. The density is 5.904g/cm33 and the atomic weight is 69.72g/mol. Avogadro's number is equal to 6.021023 atoms/mol. Determine: (a) The number of atoms in each unit cell and (b) The packing factor in the unit cell

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