Hỗn hợp X gồm etan, eten và propin. Cho 6,12 gam X...

A

- Hướng dẫn giải

Phương pháp giải:

Giải chi tiết:

\(\begin{gathered}
\left\{ \begin{gathered}
{C_2}{H_6}:x \hfill \\
{C_2}{H_4}:y \hfill \\
{C_3}{H_4}:z \hfill \\
\end{gathered} \right. \hfill \\
*{m_X} = 6,12 \to 30x + 28y + 40z = 6,12(1) \hfill \\
*X + B{r_2}: \hfill \\
0,095\,mol\,X.......\,0,07\,mol\,B{r_2} \hfill \\
x + y + z\,\,\,\,\,\,\,\,........y + 2z \hfill \\
\to 0,095(y + 2z) = 0,07(x + y + z)(2) \hfill \\
*X + AgN{O_3}: \hfill \\
{C_3}{H_4}\xrightarrow{{AgN{O_3}}}{C_3}{H_3}Ag \hfill \\
z\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,z \hfill \\
\to m \downarrow = {m_{{C_3}{H_3}Ag}} \to 147z = 7,35(3) \hfill \\
(1)(2)(3) \to \left\{ \begin{gathered}
30x + 28y + 40z = 6,12(1) \hfill \\
0,095(y + 2z) = 0,07(x + y + z)(2) \hfill \\
147z = 7,35(3) \hfill \\
\end{gathered} \right. \to \left\{ \begin{gathered}
x = 0,1 \hfill \\
y = 0,04 \hfill \\
z = 0,05 \hfill \\
\end{gathered} \right. \hfill \\
\to {m_{{C_2}{H_4}}} = 0,04.28 = 1,12(g) \hfill \\
\end{gathered} \)

Đáp án A