The density of solid argon is \( 4 / \pi \mathrm{g} / \mathrm{cm}^{3} \) at \( -233^{\circ} \mat...

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The density of solid argon is \( 4 / \pi \mathrm{g} / \mathrm{cm}^{3} \) at \( -233^{\circ} \mathrm{C} \). If the argon atoms are assumed to be spheres of radius \( 1.5 \times 10^{-8} \mathrm{~cm} \), the approximate percentage of empty space in solid argon is \( (\mathrm{Ar}=40) \)
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