Consider the reaction 2 NO2 (g) ⇌ 2 NO (g) + O2 (g). If the initial partial pressure of NO2 (g) is 3.0 bar, and x is the equilibrium pressure of O2 (g), what is the correct equilibrium relation?

Answer 1

..........2NO2(g) ⇌ 2NO(g) + O2(g)
I..........3..........0.......0
C.........-2x........ 2x......x
E.........3-2x....... 2x......x

OK?

Answer 2

por que -2x si lo que se le quita a No2 es -2x^2