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An element crystallising in body centred...

An element crystallising in body centred cublic lattice has edge length of 500 pm. If the density is 4 g `cm^(-3)`, the atomic mass of the element `("in g mol"^(-1))` is (consider `N_(A)=6xx10^(23))`

A

100

B

250

C

125

D

150

Text Solution

Verified by Experts

The correct Answer is:
D
`M=(rhoxxN_(A)xxa^(3)xx10^(-30))/Z`
`M=((4 g cm^(-3))xx(6xx10^(23)mol^(-1))xx(500)^(3)xx(10^(-30)cm^(3)))/2`
`=150 g " mol"^(-1)`
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