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Urvashi Sha
Asked: 2022-11-06T09:00:53+05:30 In:

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

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
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  1. Correct Answer – 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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