Question

Sulphur has a molecular formula S8. Calculate no of molecules and no of atoms in 64g of sulphur

Answer 1

S=32
therefore, S8=32*8=256
256g of S contains 6.023*10^23 molecules
1g of S contains (6.023*10^23)/256 molecules
64g of S contains (6.023*10^23*64)/256 molecules
                              0.26*6.023*10^23 molecules.
similarly do the atoms part...