подберите коэффициенты в уравнениях реакций А)  Na2SO3 + HCl = NaCl + CO2 + H2O Б)  K2HPO4 + AgNO3 = Ag3PO4 + KH2PO4 + KNO3 В)  Ca(OH)2 + NH4Cl = CaCl2 + NH3 +H2O
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