M= 2x 127g/mol= 254g/mol I2
M= 2x 35,5g/mol= 71g/mol Cl2 si Vm=22,4l/mol ptr.gaze
1 mol 1mol
2KI +Cl2 --> 2KCl+ I2
2mol..............niu= 2 mol I2
b. 22,4l............22,4l
56l...............V= 56l I2
C. 71g...........254g
355g...........m--------------------------> calculeaza masa de iod !!!