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NH(4)Cl crystallises in a body centred c...

`NH_(4)Cl` crystallises in a body centred cubic lattice with a unit cell distance of 387 pm. Calculate
(a) the distance between the oppositely charged ions in the lattice.
(b) the radius of `NH_(4)^(+)` ion if that of `Cl^(-)` ion is 181 pm.

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The correct Answer is:
(a) 335.15 pm, (b) 154.15 pm
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