Question

Radon is a colorless, odorless, radioactive noble gas. Because it occurs naturally in soil, it can become trapped in homes and buildings. Despite a short half-life of only 3.83 days, high concentrations of radon indoors can pose a risk of lung cancer. (For this reason, many modern homes and buildings have radon reduction systems installed.) Consider an enclosed space in a building which contains 3.30 g of radon gas at time t = 0. What mass of radon (in g) will remain in this space after 2.40 days have passed?

Answer 1

Mass of radon at any instant is given by m(t)= mo ēdt where a decay constant a= ln? and ty2= 3.83 day C ty z i At t= 2.40 days m= 3:30 e ne x240 .:| = 2.13791+ Remaining mase g codon qtox 2.40 days