A. 9
B. 8,5
C. 10
D. 8
A
\( \Rightarrow \left\{ \begin{gathered} CT\,\,X:\,\,{(C{H_3}COON{H_3})_2}{C_2}{H_4} \hfill \\ CT\,\,Y:\,\,N{H_2}C{H_2}CONHC{H_2}COON{H_3}{C_2}{H_5} \hfill \\ \end{gathered} \right. \Rightarrow \left\{ \begin{gathered} 2\,\,muoi\left\{ \begin{gathered} C{H_3}COONa \hfill \\ N{H_2}C{H_2}COONa \hfill \\ \end{gathered} \right. \hfill \\ 2\,\,a\min \left\{ \begin{gathered} {C_2}{H_4}{(N{H_2})_2} \hfill \\ {C_2}{H_5}N{H_2} \hfill \\ \end{gathered} \right. \hfill \\ \end{gathered} \right.\)
\(\begin{gathered} \left\{ \begin{gathered} 180{n_X} + 177{n_Y} = 8,91 \hfill \\ {n_X} + {n_Y} = 0,05 \hfill \\ \end{gathered} \right. \Rightarrow \left\{ \begin{gathered} {n_X} = 0,02 \hfill \\ {n_Y} = 0,03 \hfill \\ \end{gathered} \right. \Rightarrow \left\{ \begin{gathered} {n_{C{H_3}COONa}} = 0,04 \hfill \\ {n_{N{H_2}C{H_2}COONa}} = 0,06 \hfill \\ \end{gathered} \right. \hfill \\ \Rightarrow m = 0,04.82 + 0,06.97 = 9,1g \hfill \\ \end{gathered} \)
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