A 0.100-g sample of an alloy of copper and silver is dissolved in nitric acid to give a solution con — Electrochemistry Chemistry Question

A 0.100-g sample of an alloy of copper and silver is dissolved in nitric acid to give a solution containing Cu²⁺ and Ag⁺ ions. This mixture is electrolyzed exhaustively to redeposit all the metal ions as the elemental metals, requiring a current of 0.150 A for 1429 s. What is the mass percent of copper in the alloy?