\(\begin{array}{l}
1)\\
2KMn{O_4} \xrightarrow{t^0} {K_2}Mn{O_4} + Mn{O_2} + {O_2}\\
2{H_2} + {O_2} \to 2{H_2}O\\
S{O_3} + {H_2}O \to {H_2}S{O_4}\\
Fe + {H_2}S{O_4} \to FeS{O_4} + {H_2}\\
FeO + {H_2} \xrightarrow{t^0} Fe + {H_2}O\\
3Fe + 2{O_2} \xrightarrow{t^0} F{e_3}{O_4}
\end{array}\)
2)
$Zn(OH)_2$ Kẽm II hidroxit bazo
HI axit ioihidric axit
$Ca(H_2PO_4)_2$ muối
