C6H6+3Cl2=C6H6Cl6
ρ=m/V
m=0,88g/cm3*5*10^3cm3=4400g C6H6
MC6H6=6AC+6AH=6*12+6*1=78g/mol
MC6H6Cl6=6AC+6AH+6ACl=6*12+6*1+6*35,5=291g/mol
78 g C6H6....................291g C6H6Cl6
4400g..........................X
X=4400*291/78=16451,38G HCH
LINDAN=13/100*16451,38=2133,99g HCH