1.

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]

Answer»

`105/(x^3)`
`422/(x^3)`
`205/(x^3)`
`211/(x^3)`

Solution :`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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