\(2Al\left(OH\right)_3\rightarrow Al_2O_3+3H_2O\left(2:1:3\right)\)
\(2C_2H_2+5O_2\rightarrow4CO_2+2H_2O\left(2:5:4:2\right)\)
\(Ba+2H_2O\rightarrow Ba\left(OH\right)_2+H_2\left(1:2:1:1\right)\)
\(CH_4+2O_2\rightarrow CO_2+2H_2O\left(1:2:1:2\right)\)
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