0.2gH2~6.5gZn~3.5gCu
35%能不能给一下过程，或者解释一下非常感谢！Zn+H2SO4--->ZnSO4+H2 65................................2 x..............................10+90-99.8=0.2 x=65*0.2/2=6.5g m(Cu)=10-6.5=3.5 Cu%=3.5/10=35%