Chapter 2, Problem 34P

A mixture of aluminum and iron weighing 9.62 g reactswith hydrogen chloride in aqueous solution according tothe parallel reactions

$\begin{array}{l}\text{2Al}+\text{6HCl}\to {\text{2AlCl}}_{\text{3}}+\text{3H2}\\ \text{Fe}+\text{2HCl}\to {\text{FeCl}}_{\text{2}}+\text{H2}\end{array}$

A 0.738-g quantity of hydrogen is evolved when the metalsreact completely. Calculate the mass of iron in theoriginal mixture.