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An element occurs in bcc structure with ...

An element occurs in bcc structure with cell edge 288 pm. Its density is 7.2 g `cm^(-3)`. Calculate the atomic mass of the element.

Text Solution

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The correct Answer is:
51.79 g `mol^(-1)`
Z = 2 for bcc structure , a=288 pm, d = 7.2 g `cm^(-3)`, `N_A =6.023 xx 10^(23) mol^(-1)`
`M= (N_A xx d xx a^3)/(Z)=(6.023 xx 10^(23) xx 7.2 xx (288)^3 xx 10^(-30))/(2) = 51.79 g mol^(-1)`
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