Hỗn hợp khí X gồm propen, etan, buta-1,3-đien, but...

B

- Hướng dẫn giải

\(\begin{gathered} + \,\,\left\{ \begin{gathered} X\,\,gom\,\,{C_3}{H_6},\,\,{C_2}{H_6},\,\,{C_4}{H_6}\overset {quy\,\,doi} \leftrightarrows {C_{\overline n }}{H_6} \hfill \\ {\overline M _X} = 12\overline n + 6 = 0,75.64 = 48 \hfill \\ \end{gathered} \right. \Rightarrow \overline n = 3,5. \hfill \\ + \,\,\left\{ \begin{gathered} \underbrace {{C_{3,5}}{H_6}}_{0,02\,\,mol}\xrightarrow{{{O_2},\,\,{t^o}}}\underbrace {C{O_2}}_{0,07\,\,mol}\xrightarrow{{Ca{{(OH)}_2}\,\,du}}\underbrace {CaC{O_3}}_{0,07\,\,mol} \hfill \\ {m_{CaC{O_3}}} = 100.0,07 = \boxed{7\,\,gam} \hfill \\ \end{gathered} \right. \hfill \\ \end{gathered} \)