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An alloy structure (element: Co, Y, Si) adopts the cubic crystal structure with lattice constant a=5.19A. Please determine: (1) the bond length between CoY,CoSi,YSi. (2)

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An alloy structure (element: Co, Y, Si) adopts the cubic crystal structure with lattice constant a=5.19A. Please determine: (1) the bond length between CoY,CoSi,YSi. (2) the density of the alloy. (Hint: atomic weight for Co: 58.9g/mol;Y:88.9g/mol;Si:28g/mol; Avogadro constant: NA=6.0221023mol1 )

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