Alloys of palladium and nickel are often used in the manufacture of electronic connectors. One such alloy contains 70.8 mol% Pd and 29.2 mol% Ni. Express the composition of this alloy in weight percentage.

Strategy In order to get started, we need to choose an amount of the alloy. Although any amount would work, 1 mole might be convenient. Once we have specified a number of moles, we can use molar masses to determine the mass of each metal and the total mass. And from those we can calculate the weight percentages.