Cu%=10%,所以Fe%=56/64*10%=8.75%C2%=24/64*10%=3.75%所以ZnCO3%=1-10%-8.75%-3.75%=77.5%C%(总)=77.5%/(60+65)*12+3.75%=7.44%+3.75%=11.19%
题是不是错了.