Question

Calculate the number of molecules of sulphur (S8) present in 16g of solid sulphur.

  • atoms and molecules CBSE Class 9
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Answer

1 mole of solid sulphur (S8) = 8 × 32g = 256g

i.e., 256g of solid sulphur contains = 6.022 × 1023 molecules

Then, 16g of solid sulpur contains {6.022×10^{23}\over 256} × 16 molecules

= 3.76 × 1022 molecules (approx)

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