n(_{Zn})=16,25/65=0,25mol
n(_{AgNO_3})=1.0,2=0,2mol
PTPU:
Zn+2AgNO(_3)->Zn(NO(_3))(_2)+2Ag
0,1.........0,2..........0,1.............0,2(mol)
n(_{Zn_{dư}})=0,2-0,1=0,1mol
Zn+Cu(NO(_3))(_2)->Zn(NO(_3))(_2)+Cu
0,1....0,1..................0,1.........0,1(mol)
m(_Y)=m(_{Ag}+m_{Cu})=0,2.108+0,1.64=28g