How many numbers of molecules of sulphur (S₈) are present in 16g of solid sulphur ?

Molecular mass of S= 32 g, Given mass= 16 g 

Molecular mass of Sulphur (S₈) = 8×32 = 256g 

Number of moles = Given mass/ Molar mass = 16/256 = 0.0625 moles 

So, to calculate number of molecules in 16g of solid sulphur: 

Number of molecules = Number of moles x Avogadro number 

= 0.0625 x 6.022 x 10²³ molecules 

= 3.763 x 10²² molecules