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At 100^@C, copper (Cu) has FCC unit cell...

At `100^@C`, copper (Cu) has FCC unit cell structure with cell edge length of x Å. What is the approximate density of `Cu` (in `g cm^(-3))` at this temperature ? [Atomic Mass of Cu = 63.55 u]

A

`105/(x^3)`

B

`422/(x^3)`

C

`205/(x^3)`

D

`211/(x^3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`d=(ZxxM)/(N_(A)xxa^(3))" for fcc"z=4`
`d=(4xx63.55)/(6.023xx10^(23xx x^(3)xx(10^(-8))^(3))`
`d=(422)/(x^(3))"gcm"^(-3)`
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