CaCO3 decomposes at 1200°C to form CO2 gas and Cao. If 25 L of CO2 are collected at 1200°C, what will the volume of this gas be after it cools to 25°C?

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)