a,Gọi nZn pư=a mol,nZn dư=b mol
Zn+S------------->ZnS
a---------------------a
=>65a+65b=16.25
và 97a=9.7
=>a=0.1,b=0.15
=>mZn pư=6.5g
b,ZnS+2HCl------------>ZnCl2+H2S
--0.1----------------------------------0.1
Zn+2HCl------------>ZnCl2+H2
0.15------------------------------0.15
=>nkhí= 0.25...