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An element having atomic mass 107.9 u ha...

An element having atomic mass 107.9 u has FCC lattice. The edge length of its unit cell is 408.6 pm. Calculate density of the unit cell.
`["Given, "N_(A)=6.022xx10^(23)"mol"^(-1)]`.

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`M=107.9" "Z=4" "a="408.6 pm"`
`d=(ZM)/(N_(A)a^(3))=(4xx107.9xx10^(3))/((408.6xx10^(-12))^(3)xx6.022xx10^(23))`
`d=10.5xx10^(3)kg//m^(3)`
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