m=115gNaCl
M,NaCl=58,5g/mol
n(niu)=m/M=115/23 =>5molNa
2mol..........1.mol.............2mol
2Na + Cl2 ----> 2NaCl
5mol.......x= 2,5mol.........y=5mol
m,Cl2= nxM= 2,5molx71g/mol=........................calculeaza!!!!!
m,NaCl= 5molx58,5g/mol=..........................calculeaza !!!