Zinc and sodium metal each react with sulfuric acid according to the following equations.

Zn(s)+H2SO4(aq)ZnSO4(aq)+H2(g)

2Na(s)+H2SO4(aq)Na2SO4(aq)+H2(g)

A 26.56 g mixture of zinc and sodium is reacted with a stoichiometric amount of sulfuric acid. The reaction mixture is then reacted with 217 mL of 2.35 M barium chloride to produce the maximum possible amount of barium sulfate. Determine the percent sodium by mass in the original mixture.

mass percent Na: _____ %