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2014-04-26T12:09:25+03:00
2 K + H2O ---> K2O + H2
2*39 g K........2 g H2
156 g K.........x g H2      x = 4 g H2
FeO + H2 ---> Fe + H2O
72 g FeO........2 g H2
y g FeO......... 4 g H2      y = 144 g FeO => 144/72 = 2 moli FeO