Răspuns:
1mol......2moli...................1mol
Zn + 2HCl → ZnCl2 +H2↑
xmoli.....ymoli..................2,5moli
x=2,5×1/1=2,5moli Zn
y=2,5×2/1= 5moli HCl
65g.......2×36,5.................2g
Zn + 2HCl → ZnCl2 +H2↑
zg.............tg.....................5g
MZn=65g/mol
MHCl=1+35,5=36,5g/mol
MH2=2×1=2g/mol
n=m/M
m=n×M=2,5×2= 5g
z=5×65/2=162,5gZn
t=5×2×36,5/2=182,5g HCl
Explicație:
