Answer to Question #100047 in General Chemistry for Beverlie

Question

Radon is a naturally occurring radioactive gas found in the ground and in building materials. It is easily inhaled and emits alpha particles when it decays. Cumulative radon exposure is a significant risk factor for lung cancer.
1. Calculate the density of radon at 325 K and 0.950 atm of pressure. answer in g/L
2. Are radon concentrations likely to be greater in the basement or on the top floor of a building?

Answer 1

1.   Pressure, p=0.950atm, temperature, T=325K

      Density, d= PM/RT

      Where R=0.08206 and M=222g is the molar mass of radon.

      d= (0.950*222)/ (0.08206*325)

      d=7.908g/L

2.   The concrete floor and walls in the basement slow down the movement of radon from the soil into the building. However, cracks in the floor, wall slab joints, and the drainage system allow radon to enter a building. Indoor radon concentrations are almost always higher than outdoor concentrations