Scrii formula de aditie a clorului la benzen
C6H6+3Cl2------->C6H6Cl6 (hexaclorociclohexan=lindan)
din formula densitatii ro=m/v scoti m=ro*v=0.88g/cm3*5000cm3=4400g benzen=4,4kg C6H6
aplici regula de 3 simpla la ecuatia data
78 g C6H6.....303gC6H6Cl6
4,4 kg C6H6..........x kg C6H6Cl6 x=17,09231kg
