In order to balance a reaction, the same number and type of atoms must exist on both sides of an equation. The following boxes contain oxygen atoms (the smaller white circles) as well as nitrogen atoms (the larger red circles). The initial box contains O2(g) and N2(g), while the final box contains NO(g). Determine the overall reaction pictured, and write an equation that summarizes what you see. Reduce your overall equation if it is reducible. Select the balanced equation that is represented in the drawings.
a. O2(g) + N2(g) → 2 NO(g)
b. 6 O2(g) + 6 N2(g) → 6 NO(g)
c. 3 O2(g) + 3 N2(g) → 6 NO(g)