Răspuns :
Răspuns:
Explicație:
4moli Zn
react. cu HCl
g,moli ZnCl2
4moli xmoli
Zn +2 HCl = ZnCl2 + H2
1mol 1mol
x= 4moli ZnCl2
m= n . M
M = 65 + 2.35,5= 136----> 136g/moli
m= 4moli .136g/moli = 544g Zn Cl2
Răspuns:
1mol.............. 1mol
Zn +2 HCl → ZnCl2 + H2↑
4moli.............xmoli
x= 4moli ZnCl2
calculam in grame
MZn=65g/mol
n=m/M
m= n x M=4x65=260g/mol
MZnCl2=65+2x35,5=136g/mol
65g..............136g
Zn +2 HCl → ZnCl2 + H2↑
260g.............yg
y=260x136/65=544g ZnCl2
Explicație: