10 grams of an alloy (composed of 65% zinc and 35% copper) was added

10 grams of an alloy (composed of 65% zinc and 35% copper) was added to hydrochloric acid. What salts are formed in solution, with what masses?

Zn mass 65% * 10 g: 100% = 6.5 g, this is 6.5 g: 65 g / mol = 0.1 mol.
Cu mass 35% * 10 g: 100% = 3.5 g, this is 3.5 g: 64 g / mol = 0.05 mol.
Salts were formed according to the reactions:
Zn + 2HCl = ZnCl2 + H2, and
Cu + 2HCl = CuCl2 + H2 in the same quantities as the starting metals.
The mass of zinc chloride is: 136 g / mol * 0.1 mol = 13.6 g.
The mass of copper chloride is: 135 g / mol * 0.05 mol = 7.4 g.