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Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

When a scientific theory has been tested and proved by the scientific community, it becomes a law

Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)