a)
$2Fe(OH)_3 \xrightarrow{t^o} Fe_2O_3 + 3H_2O$
b)
$m_{Fe(OH)_3\ pư} = m_{Fe_2O_3} + m_{H_2O} = 96 + 32,4 = 128,4(gam)$
c)
$\%m_{Fe(OH)_3\ bị\ phân\ huỷ} = \dfrac{128,4}{160}.100\% = 80,25\%$
\(a,2Fe\left(OH\right)_3\rightarrow\left(t^o\right)Fe_2O_3+3H_2O\\ b,m_{Fe\left(OH\right)_3\left(p.ứ\right)}=m_{H_2O}+m_{Fe_2O_3}=32,4+96=128,4\left(g\right)\\ c,\%m_{\dfrac{Fe\left(OH\right)_3\left(p.huỷ\right)}{Fe\left(OH\right)_3\left(bđ\right)}}=\dfrac{128,4}{160}.100\%=80,25\%\)