напишите срочно окислительную восстановительную функцию
1.I2+K2SO3+KOH =K2SO4+KI+H2O 
2.NO+HCL O4+H2O=HNO3+HCL
3.Na2SO3+KMnO4+H2O=Na2So4+MnO2+KOH.
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