May 28, 2020 · What is the density of laughing gas, dinitrogen monoxide, N 2 O, at a temperature of 325 K and a pressure of 113.0 kPa? Calculate the density of Freon 12, CF 2 Cl 2, at 30.0 °C and 0.954 atm. Which is denser at the same temperature and pressure, dry air or air saturated with water vapor? Explain.