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

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

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