В порядке уменьшения W (Cu) CuSO4,Cu (OH)2,CuO,Cu2O
Mr(CuSO4)=64+32+4*16= 160 W(Cu)=64/160=0.4=40% Mr(Cu(OH)2)=64+2*16+2*1= 98 W(Cu)=64/98=0.65=65% Mr(CuO)=64+16=80 W(CuO)=64/80=0.8=80% Mr(Cu2O)=2*64+16=144 W(Cu)=128/144=0.89=89% Ответ: Cu2O, CuO, Cu(OH)2, CuSO4