Q
Fe+O2--to-->Fe3O4
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[TEX]N_2 +3 H_2 -> 2NH_3[/TEX]N2 + H2= N2H2(chất khí)
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[TEX]N_2 +3 H_2 -> 2NH_3[/TEX]
chứ nhỉ?
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NaOH(dung dịch pha loãng) + 4H2O = [Na(H2O)4]OH
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HCl+Fe--->FeCl2+H2
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