Calculate the number of molecules of Sulphur (S8) in 64 g of sulphur

CBSE Class 9
1

Calculate the number of molecules of Sulphur (S8) in 64 g of sulphur.
Given atomic mass of S = 32 u, Avogadro’s number = 6.022 x 1023.

2

Molecular mass of S8 = 32 x 8 = 256 g
i.e. 256 g of S8 contains 6.022 x 1023 molecules
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= 1.505 x 1023 molecules molecules