a) \(2KMnO_4\xrightarrow[]{t^o}K_2MnO_4+MnO_2+O_2\left(2:1:1:1\right)\)
b) \(3Fe+2O_2\xrightarrow[]{t^o}Fe_3O_4\left(3:2:1\right)\)
c) \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\left(2:3:1:2\right)\)
d) \(CH_4+2O_2\xrightarrow[]{t^o}CO_2+2H_2O\left(1:2:1:2\right)\)
e) \(2SO_2+O_2\xrightarrow[V_2O_5]{t^o}2SO_3\left(2:1:2\right)\)
g) \(Fe_xO_y+yH_2\xrightarrow[]{t^o}xFe+yH_2O\left(1:y:x:y\right)\)