The drawings below illustrate four mixtures of two diatomic gases (nitrogen, N₂ (blue) and oxygen, O₂ (red)) in flasks of identical volume and at the same temperature.

(a) Which flask has the highest partial pressure of oxygen, depicted by the red molecules?

(b) Which flask has the lowest partial pressure of nitrogen, depicted by the blue molecules?

(c) Which flask does the Partial Pressure of O₂ equal the Partial Pressure of N₂?

(a) (b) (c) (d)