Răspuns:
calculam in moli cantitataea de clor
2moli....1mol
2Na + Cl2 → 2NaCl
4moli xmoli
x=4×1/2=2moli Cl2
calculam in gramecantitataea de clor
MNa=23g/mol
MCl2=2×25,5=71g/mol
m=4×23=92gNa
2×23g 71g
2Na + Cl2→ 2NaCl
92g yg
y=92×71/2×23=calculeaza
Explicație: