100% volum Cl ..................... 10% nu reactioneaza
100 L ........................................ v = 10 L nereactionati
=> vor reactiona doar 90 L
PV = nRT
P = 1,23, T = 273+27 = 300 K
V = 90 L, n = ?
=> n = PV/RT
= 1,23x90/0,082x300
= 4,5 moli Cl2
m g 4,5 moli
C6H6 + 3Cl2 --h.niu--> C6H6Cl6
78 3
=> m = 78x4,5/3
= 117 g benzen