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Answer the following question
 
Calculate the number of molecules of sulphur (\(S_8\)) present in 16 g of solid sulphur.
 
Molar mass of \(S_8\) sulphur = = \(6.022\) x \(10^2{^3}\) molecule.

Given mass of sulphur  = 16g.
 
Molecules of sulphur  = x \(6.022\) x \(10^2{^3}\) / 256.

                                      = \(96.35\) x \(10^2{^3}\) / 256.

                                      = \(0.376\) x \(10^2{^3}\).

                                      = x \(10^2{^2}\) molecules.