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Answer:

Calculate the number of molecules of sulphur (S 8 ) present in 16 g of solid sulphur.

16 / 256 = N / 6.022 x 10 23.

= 6.022 x 10 23 / 16.

= 3.011 x 10 23 /8.

= 0.37 x 10 23 molecules of Sulphur(S 8 )

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Explanation:

The molecular mass of the sulphur molecule is 32 × 8 = 256 u.

1 mole of sulphur molecules is equal to 256 grams.

This means 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

Therefore, 16 g of S8 contains 3.76 x 10²² molecules

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