Mr(Cu(OH)2)=64+16*2+1*2=98
Mr(H2SO4)=1*2+32+16*4=98
Mr(P2O5)=31*2+16*5=142
1) Ar(Cu)=64; Ar(O)=16; Ar(H)=1
2) Ar(H)=1; Ar(S)=32; Ar(O)=16
3) Ar(P)=31; Ar(O)=16
Mr(Cu(OH)2)=64+16*2+1*2=98
Mr(H2SO4)=1*2+32+16*4=98
Mr(P2O5)=31*2+16*5=142
1) Ar(Cu)=64; Ar(O)=16; Ar(H)=1
Mr(Cu(OH)2)=64+16*2+1*2=98
2) Ar(H)=1; Ar(S)=32; Ar(O)=16
Mr(H2SO4)=1*2+32+16*4=98
3) Ar(P)=31; Ar(O)=16
Mr(P2O5)=31*2+16*5=142