a,\(m_{O2}+m_D=m_{CO2}+m_{H2O}\left(BTKL\right)\)
\(\Rightarrow m_D=13,3+7,2-14,4=6,1\left(g\right)\)
\(\Rightarrow M_D=\frac{6,1}{0,1}=61\)
b,
\(n_C=n_{CO2}=\frac{13,44}{44}=0,3\left(mol\right)\)
\(\Rightarrow m_C=3,6\left(g\right)\)
\(n_H=2n_{H2O}=\frac{2.7,2}{18}=0,8\left(mol\right)\)
\(\Rightarrow m_H=0,8\left(g\right)\)
\(\Rightarrow m_O=6,1-3,6-0,8=1,7\left(g\right)\)
\(\Rightarrow n_C=0,1\left(mol\right)\)
\(n_C:n_H:n_O=0,3:0,8:0,1=3:8:1\)
Công thức đơn giản là (C3H8O)n
\(M=61\Rightarrow60n=61\left(?\right)\)
