Gold forms a substitutional solid solution with silver. Compute the number of gold atoms per cubic centimeter for a silver$-$gold alloy

that contains $36wt\%Au$ and $64wt\%Ag.$ The densities of pure gold and silver are $19\mathrm{.}32$ and $10\mathrm{.}49\frac{g}{c}{m}^3,$ respectively. The atomic

weight of Au is $196\mathrm{.}97\frac{g}{m}ol.$

$N_{Au}=$

atoms $\frac{?}{c{m}^3}$