How many molecules of benzene `(C_(6) H_(6))` are there in `1 L` of benzene ? Specific gravity of benzene is 0.88.

Explanation

`Mw` of benzene `(C_(6) H_(6)) = 12 xx 6 + 1 xx 6 = 78 g`
1 litre of benzene `= 1000 mL`
Mass of `1000 mL` of benzene = volume `xx` density
`= 1000 xx 0.88 = 880 g`
`:. 78 g` og benzene `= 6.023 xx 10^(23)` molecules
`800 g` of benzene `= (6.023 xx 10^(23) xx 880)/(78)`
`= 6.795 xx 10^(24)` molecules