M(Zn)=3.25г m(HCl)=5г m(ZnCl2)-? уравнение реакций Zn+2HCl=ZnCl2+H2
N(Zn)= m/M= 3.25/65=0.05 1/0.05= x/0.05 x=1 m(ZnCl2)=n*M= 0.05*(65+35.5*2)=6.8