101 Задачка по химии №010 178

103. Can redox reactions occur between substances: a) PH3 and HBr; b) K2Cr2O7 and H3PO3; c) HNO3 and H2S? Why?
Based on the electronic equations, arrange the coefficients in the reaction equation following the scheme
HNO3 AsH3 → H3AsO4 NO2 H2O

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