Which substance in the reaction below either appears or disappears the fastest? 4NH3 + 7O2 → 4NO2 + 6H2O Which substance in the
reaction below either appears or disappears the fastest? 4NH3 + 7O2 4NO2 + 6H2O H2O NO2 O2 NH3 The rates of appearance/disappearance are the same for all of these.