Urgent,va rog frumos!

Răspuns:
Zn+HCl = ZnCl + 1/2H2
mH2 = 1/2*1 = 1/2 g
mZn = 1*65 = 65 g
1/2 g H2/6 g H = 65 g Zn/ x g Zn
x = 780 g Zn
Explicație: