An element (at mass 60) havind FCC struc...

An element (at mass 60) havind FCC structure has a density of `6.23"g cm"^(-3)`. What is the edge length of the unit cell ?

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`M=60"g mol"^(-1)`, z (f.c.c. lattice) = 4
`d=6.23"g cm"^(-3)`
`N_(A)=6.022xx10^(23)"mol"^(-1)`
a = ?
d =
`a^(3)=`
`="cm"^(3)`
`=64xx10^(-24)"cm"^(3)`
`a=4xx10^(-8)"cm"=400"pm"`

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