Q .     The density of solid argon is `1.65 g //cc` at-` 233^(0)C`. If the argon atom is assumed to be a sphere of radius `1.54 xx 10^(-8) cm`, what percent of solid argon is apparently empty space? `(Ar = 40)`

VIT 2013
A

`16.5%`

B

`38%`

C

`50%`

D

`62%`

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