Question

calculate the no.of molecules of S=32 and atoms in192 g of SulphurS8

Answer 1

Molecule of sulphur exist as S8, 

Therefore mass of 1 mole of sulphur molecule is 256g

Hence number of molecules present in 256 g = 1 mole 

Number of molecules present in 192 g = 256/ 192 mole 

⇒ Number of molecules present in 192 g = 1.33 mole 

Hence number of molecules present in 192 g = 1.33 × 6.022 ×  1023 molecule.

= 8.029 ×  1023 molecule.