1) M(CuSo4)=160g/mol M(Cu)=64g/mol W(Cu)=64/160 * 100=40% 2)W=m(вещ)/m(раствора) *100% 20/100 *100=20% 3)300*0,24=72г
1) M(CuSo4)=160g/mol M(Cu)=64g/mol W(Cu)=64/160 * 100=40% 2)W=m(вещ)/m(раствора) *100% 20/100 *100=20% 3)300*0,24=72г