Radon is a colorless, odorless, radioactive noble gas. Because it occurs naturally in soil, it can become trapped in hom

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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 3.01 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?
g