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Tungsten has bcc lattice. Each edge of t...

Tungsten has bcc lattice. Each edge of the unit cell is 316 pm and the density of the metal is 19.35g `cm^(-3)`. How many atoms are present in 50 g of this element?

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For bcc, Z=2, a=316 pm = `316xx10^(-10)` cm
d=19.35 g/cc w=50
Number of atoms =`(Zxxw)/(a^3xxd)=(2xx50)/((316xx10^(-10))^3xx19.35)`
`=1.64xx10^23` atoms
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