Mng làm cụ thể giúp mình nhaaaa

Em tham khảo nha:

\(\begin{array}{l}
a)\\
CTDGN:{C_x}{H_y}{O_z}\\
\% {m_O} = 100 - 55,81 - 6,98 = 37,21\% \\
x:y:z = \dfrac{{55,81}}{{12}}:\dfrac{{6,98}}{1}:\dfrac{{37,21}}{{16}} = 4,65:6,98:2,325625\\
 \Rightarrow x:y:z = 2:3:1 \Rightarrow CTDGN:{C_2}{H_3}O\\
b)\\
CTPT\,X:{({C_2}{H_3}O)_n}\\
{M_X} = 3,07 \times 28 \approx 86\,g/mol\\
 \Rightarrow 43n = 86 \Rightarrow n = 2\\
CTPT:{C_4}{H_6}{O_2}
\end{array}\)