Temperature and kinetic energy of particles

The amount of $\ce{NO2}$ prepared was checked by titration. The gas was first absorbed in water: $\ce{2NO2(g) + H2O(l) -> HNO3(aq) + HNO2(aq)}$ The resulting solution was made up to 200.0 $\mathrm{cm^3}$ in a volumetric flask, and 20.0 $\mathrm{cm^3}$ portions…

An ideal gas is held in a rigid, sealed container at 27 °C, where its pressure is $P$ Pa. The container is then cooled to −3 °C. Which expression best describes the new pressure of the gas? A. Slightly less than $P$ B. Slightly more than $P$ C. One ninth of…