Final answer:
The substance that either appears or disappears the fastest is O₂. To determine which substance appears or disappears the fastest in a chemical reaction, we can look at the coefficients in the balanced chemical equation. The balanced equation for the reaction you provided is: 4NH3 +7O2 →4NO2 +6H2O.
Step-by-step explanation:
In the reaction 4NH3 + 7O2 → 4NO2 + 6H2O, the substance that either appears or disappears the fastest is O2. In this reaction, the coefficients represent the mole ratios between the reactants and products. The substance that appears or disappears the fastest is the one with the largest coefficient. In this case, oxygen (2O2) has a coefficient of 7, which is the highest coefficient among all the substances involved in the reaction. Therefore, oxygen (2O2) is the substance that either appears or disappears the fastest in the given reaction.
The substance that either appears or disappears the fastest is O₂. To determine which substance appears or disappears the fastest in a chemical reaction, we can look at the coefficients in the balanced chemical equation. The balanced equation for the reaction you provided is: 4NH3 +7O2 →4NO2 +6H2O.