Atomic mass of $U^{238}$ is 238.125 amu. Its packing fraction will be :

6.25

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0.125

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12.5

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5.25

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Solution

The correct option is D 5.25
Isotopic atomic weight of $U^{238} = 238.125$ amu
Atomic weight of $U^{238} = 238$ amu
$∴$ Packing fraction $= \frac{238.125 - 238}{238} \times 10^{4}$
$= 5.25$

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