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H2O + K2O --> 2KOH
H2O + N2O5 --> 2HNO3
2Fe2S3 + 3PbO2 ----> 2Fe2O3 + 3PbS2
woda + tlenek potasu → KOH
H2O + K2O ---> 2KOH
woda + tlenek azotu(V) → HNO₃
H2O + N2O5 ---> 2HNO3