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Aluminium has fcc structure. The length ...

Aluminium has fcc structure. The length of the unit cell is 409 pm. If the density of the metal is `2.7 g" " cm^(-3)`, the molar mass of Al atom is

A

`28gmol^(-1)`

B

`30gmol^(-1)`

C

`26.80gmol^(-1)`

D

`25gmol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`M=(da^3N_A)/(Z) = (2.7xx10^(-10)^3xx6.023xx10^23)/(4)`
`=26.80gmol^(-1)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SOLID STATE-EXERCISE 1
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