C=md/ms*100=>md=C*ms/100=36,5*600/100 = 219g HCl
nHCl = 219/36,5 = 6 moli
Doar Zn reactioneaza:
65g....2 moli
Zn + 2HCl -> ZnCl₂ + H₂↑
xg........6 moli
x=195g Zn
m Cu =300-195 = 105g
a) %Zn=195/300*100 = 65%
%Cu=35
b) 2 moli HCl.......................22,4 L H₂
6 moli HCl...........................x=67,2 L H₂