Who, exactly, wanted to ask a search engine questions that would be answered by bullshit?

I quote:

    what is the stoichiometric ratio between 2NO2 and N2O4

The stoichiometric ratio between nitrogen dioxide (NO2) and dinitrogen tetroxide (N2O4) is 1:1. This means that for every one molecule of nitrogen dioxide (NO2) that reacts, one molecule of dinitrogen tetroxide (N2O4) is formed. The equilibrium reaction between nitrogen dioxide and dinitrogen tetroxide can be represented as:

2NO2 ⇌ N2O4

In this reaction, two molecules of nitrogen dioxide can form one molecule of dinitrogen tetroxide, and vice versa.