\(n_{C2H4\left(OH\right)2}=0,066\left(mol\right)\)
\(C_2H_4\left(OH\right)_2+CuO\rightarrow\left(CHO\right)_2+Cu+H_2O\)
\(\rightarrow n_{\left(CHO\right)2}=0,066\left(mol\right)\)
\(\rightarrow n_{CHO}=0,132\left(mol\right)\)
\(CHO+2AgNO_3+3NH_3+H_2O\rightarrow COONH_4+2Ag+2NH_4NO_3\)
\(\rightarrow n_{Ag}=0,264\left(mol\right)\)
\(\rightarrow m_{Ag}=28,512\left(g\right)\)