Calculate the number of molecular of sulphur `(S_(8))` present in 128g of sulphur.

Explanation

`256"g of sulphur "(S_(8))"represent"=1"mol"`
`128"g of sulphur "(S_(8))"represent"=((1"mol")xx(128g))/((256g))=0.5"mol"`
`"1 mole of "S_(8)"has molecules"=6.022xx10^(23)`
0.5 moles of `S_(8)` has molecules `=((0.5"mol"))/((1.0"mol"))xx6.022xx10^(23)=3.011xx10^(23)`