Расставьте коффицыенты в схемах реакций 1)Fe2O3+Al->Al2O3+Fe 2)N2O3+H2O->HNO2 3)FeO+H2->H2O+Fe 4)Nal+Br2->NaBr+I2 5)KNO3->KNO2+O2 прошу решите
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