Can someone explain why for this problem the products go tog

Can someone explain why for this problem the products go together when \"the rate of H20 is being formed\" but the reactant and product (NH3 and N2) go together when asked for the \"rate of ammonia being consumed\"? I thought that O2 would be matched with H20 when asked the rate of H20 being formed. The girl who answered this drew those arrows so I am confused how she paired them.

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Solution

This is not necessary to match O₂ with H₂O in H₂O formation...All reactants and products are related to eachother for the formation of H₂O and N₂.Beacuse they are associated in one reaction with their stochiometric constants..

You can also paired NH₃-H₂O or O₂-N₂ or NH₃-O₂ or N₂-H₂O or O₂-H₂O,depends on the given values and what you want?

If you don\'t have the rate of diappearance of O₂ then how can you find rate of formation of H₂O?

That\'s why she paired them (N₂-H₂O). Because you have only value of rate of formation of N₂.

If you have rate of disappearance of O₂ then you can paired them(O₂-H₂O) to find rate of formation of H₂O.