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Question

Question 10
Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.

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Solution

1 mole of solid sulphur (S8) =8×32g=256g
i.e., 256 g of solid sulphur contains =6.022×1023 molecules
Then, 16 g of solid sulphur contains =6.022×1023256×16 molecules
=3.76375×1022 molecules

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