Copper(II) ions oxidise iodide ions: $2\text{Cu}^{2+} + 4\text{I}^- \rightarrow 2\text{CuI} + \text{I}_2$. The iodine released needs $24.5\ \text{mL}$ of $0.0400\ \text{mol/L}$ thiosulfate, by $\text{I}_2 + 2\text{S}_2\text{O}_3^{2-} \rightarrow 2\text{I}^- + \text{S}_4\text{O}_6^{2-}$. How many moles of copper(II) were in the sample?