\(n_{Fe}=\dfrac{6,5}{56}=\dfrac{13}{112}mol\)
\(m_{CH_3COOH}=\dfrac{90\cdot20\%}{100\%}=18g\Rightarrow n_{CH_3COOH}=0,3mol\)
\(Fe+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Fe+H_2\uparrow\)
\(\dfrac{13}{112}\) 0,3 0 0
\(\dfrac{13}{112}\) \(\dfrac{13}{56}\) \(\dfrac{13}{112}\) \(\dfrac{13}{112}\)
0 \(\dfrac{19}{280}\) \(\dfrac{13}{112}\) \(\dfrac{13}{112}\)
a)\(m_{\left(CH_3COO\right)_2Fe}=\dfrac{13}{112}\cdot174=20,2g\)
\(m_{H_2}=\dfrac{13}{112}\cdot2=\dfrac{13}{56}g\)
\(m_{dd\left(CH_3COO\right)_2Fe}=6,5+90-\dfrac{13}{56}=96,27g\)
\(C\%=\dfrac{20,2}{96,27}\cdot100\%=20,98\%\)