n = m/M => n = 212kg/106 = 2 kmoli paraxilen
n = V/Vs => n = 134,4/22,4 = 6kmoli gaz degajat/ Cl2
2 kmoli 6
paraxilen + xCl2 -----> compus clorurat
1 kmol x kmoli
=> x = 3 moli de gaz => 3 moli de clor folositi la reactie
=> compusul va avea 3 atomi de clor