In chemical reactions, there is a conservation of(1) energy, volume and mass
(2) energy, volume and charge
(3) energy, charge and mass
(4) energy, charge and volume

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)