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Question
Face centred cubic crystal lattice of copper has density of 8.966 g.cm-3. Calculate the volume of the unit cell. Given molar mass of copper is 63.5 g mol-1 and Avogadro number NA is 6.022 x 1023 mol-1
Solution
Data: d=8.966 g cm-1
M.M. of copper = 63.5 gmol–1
NA=6.022XX1023
Solution : `d=(ZxxM)/(VxxN_A)`
Z=4(∵ Fcc)
`V=(ZxxM)/(d xx N_A)`
`=(4xx63.5)/(8.966xx6.023xx10^23)`
| V=4.704x10-23 cm3 |
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