Câu 1: Cho kim loại M và các hợp chất X, Y, Z thỏa mãn các phương trình hóa học sau: \[\begin{gathered}(a)\,\,2M + 3C{l_2}\xrightarrow{{{t^0}}}2MC{l_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(b)\,\,2M + 6HCl\xrightarrow{{}}2MC{l_3} + 3{H_2} \hfill \\(c)\,\,2M + 2X + 2{H_2}O\xrightarrow{{}}2Y + 3{H_2}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(d)\,\,Y + C{O_2} + 2{H_2}O\xrightarrow{{}}Z …
\[\xrightarrow{{}}\] \[\begin{gathered} (a)\,\,2M + 3C{l_2}\xrightarrow{{{t^0}}}2MC{l_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(b)\,\,2M + 6HCl\xrightarrow{{}}2MC{l_3} + 3{H_2} \hfill \\ (c)\,\,2M + 2X + 2{H_2}O\xrightarrow{{}}2Y + 3{H_2}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(d)\,\,Y + C{O_2} + 2{H_2}O\xrightarrow{{}}Z + KHC{O_3} \hfill \\ \end{gathered} \] $$ \left\{ \begin{array}{c} a_1x+b_1y+c_1z=d_1 \\ a_2x+b_2y+c_2z=d_2 \\ a_3x+b_3y+c_3z=d_3 \end{array} \right. $$ \[{K_2}C{r_2}{O_7}\xrightarrow{{ …