Question

Radon is a potentially harmful gas that can sometimes leak into the air in homes. Concentrations higher than 500 ppm are considered dangerous. If a 300 g sample of air contains

1.0 x 10-2 g of radon, is it dangerous? Show all your work.

Answer 1

Permissible concentrations of radon = 500 ppm

i.e. 10⁶ ml of air contain 500 g radon

300 ml air contain =( 500/10⁶ ) × 300 g radon

= 15 × 10^-2 g radon

Hence,

If radon content in 300 ml of air is more than the value 15 × 10^-2 g . Then the air is dangerous.

So, if in the 300 ml of air 1.0 × 10^-2 g radon present , as the value is much lower than the maximum permissible limit .

So, the air is not dangerous.