\(=\left(\frac{57.5}{115}\right)=0.5\, {~mol}\)

\(\Rightarrow {C}_{7} {H}_{17} {~N}+\frac{45}{2} {CuO} \rightarrow 7 {CO}_{2}+\frac{17}{2} {H}_{2} {O}+\frac{1}{2} {~N}_{2}+\frac{45}{2} {Cu}\)

\(\frac{{n}_{{cuo}} \text { reacted }}{\left(\frac{45}{2}\right)}=\frac{{n}_{{C_7} {H}_{17} {N}} \text { reacted }}{1}\)

\(\Rightarrow {n}_{{C} {u} O}\) reacted \(=\left(\frac{45}{2}\right) \times 0.5=11.25\)