A. 2
B. 5
C. 6
D. 7
C
\(\left\{ \begin{gathered} {n_{NaOH}} = 0,285 \hfill \\ {n_E} = 0,12 \hfill \\ \end{gathered} \right.\xrightarrow{{}}\left\{ \begin{gathered} {n_Y} = 0,045 \hfill \\ {n_X} = 0,075 \hfill \\ \end{gathered} \right.\)
Với 17,02 gam E \(\left\{ \begin{gathered} {n_X} = x \hfill \\ {n_Y} = y \hfill \\ \end{gathered} \right.\xrightarrow{{chay}}\left\{ \begin{gathered} C{O_2}:0,81 \hfill \\ {H_2}O:z \hfill \\ \end{gathered} \right.\xrightarrow{{}}\left\{ \begin{gathered} 3x - 5y = 0 \hfill \\ x + 5y = 0,81 - z \hfill \\ 0,81.12 + 2z + 32(2x + 3y) = 17,02 \hfill \\ \end{gathered} \right.\)
\(\xrightarrow{{}}\left\{ \begin{gathered} x = 0,05 \hfill \\ y = 0,03 \hfill \\ z = 0,61 \hfill \\ \end{gathered} \right.\xrightarrow{{}}\left\{ \begin{gathered} C{H_2} = CH - COONa:0,03 \hfill \\ {C_6}:0,05 \hfill \\ \end{gathered} \right.\xrightarrow{{}}\left\{ \begin{gathered} \left\{ \begin{gathered} {C_2} \hfill \\ {C_4} \hfill \\ \end{gathered} \right.\xrightarrow{{}}2 \hfill \\ \left\{ \begin{gathered} {C_1} \hfill \\ {C_5} \hfill \\ \end{gathered} \right.\xrightarrow{{}}4 \hfill \\ \end{gathered} \right.\)
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