Ответ:
Ca+4HNO3→Ca(NO3)2+2NO2+2H2O
2KOH+H2SO4→K2SO4+2H2O
Au+H2SO4→AuO+SO2+H2O
2KNO3→2KNO2+O2
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Ответ:
Ca+4HNO3→Ca(NO3)2+2NO2+2H2O
2KOH+H2SO4→K2SO4+2H2O
Au+H2SO4→AuO+SO2+H2O
2KNO3→2KNO2+O2