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Answer :
Molecular mass of Sulphur (S\(_8\))
= 8 × Mass of Sulphur = 8 × 32 = 256g
Given mass of solid sulphur = 16g
\( Number \ of \ moles \) = \( Given \ mass \over Molar \ mass \ of \ Sulphur \) = \( 16 \over 256 \) = 0.0625 moles
Number of molecules
= Number of moles × Avogadro number
\( = 0.0625 × 6.022 × 10^{23} \)
\( = 3.763 × 10^{22} \) molecules