The formation of dinitrogen pentoxide is described by the following chemical equation: → + 2 no 2 g o 3 g + o 2 g n 2 o 5 g suppose a two-step mechanism is proposed for this reaction, beginning with this elementary reaction: → + no 2 g o 3 g + no 3 g o 2 g suppose also that the second step of the mechanism should be bimolecular. suggest a reasonable second step. that is, write the balanced chemical equation of a bimolecular elementary reaction that would complete the proposed mechanism.