Đáp án đúng: D
520,57 gam
Gọi số mol ZnO, Al2O3, Fe lần lượt là x, y, z
$\left\{ \begin{array}{l}ZnO\,\,(x)\\A{{l}_{2}}{{O}_{3}}\,\,(y)\\Fe\,\,\,(z)\end{array} \right.\xrightarrow{+HCl}\left\{ \begin{array}{l}ZnC{{l}_{2}}\,\,(x)\\AlC{{l}_{3}}\,\,\,(2y)\\FeC{{l}_{2}}\,\,\,(z)\end{array} \right.$
$\Rightarrow \left\{ \begin{array}{l}81x+102y+56z=34,1\\136x+133,5.2y+127z=79,7\\z=0,1\end{array} \right.\Rightarrow \left\{ \begin{array}{l}x=0,1\\y=0,2\\z=0,1\end{array} \right.$
${{n}_{HCl}}=2x+6y+2z=1,6\Rightarrow {{m}_{HCl}}=58,4\,gam$
$\Rightarrow {{m}_{dd\,HCl}}=\,486,67\,gam$
Bảo toàn khối lượng có${{m}_{Y}}={{m}_{\text{dd}\,HCl}}+{{m}_{X}}-{{m}_{{{H}_{2}}}}=520,57\,gam$
