M,C6H5Cl= 112,5g/mol M,Cl2=71g/mol
din ecuatia chimica , deduc masa de clorobenzen care se obtine cu randament 100%
1kmol.............1kmol sau, in grame
C6H6 + Cl2----> C6H5Cl + HCl
71kg................112,5kg
355kg .......m= 562,5kg masa teoretica
randamentul= 95
95/100= m,practic/562,5====================> calculeaza !!!!!