out of 18 Radon is a naturally occurring radioactive gas found in the ground and
ID: 102736 • Letter: O
Question
out of 18 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. 1st attempt Part 1 (0.5 point) See Periodic Table See Hint Calculate the density of radon at 321 K and 0.950 atm of pressure g/L. Part 2 (0.5 point) O See Hint 09,14 > 2 OF 14 QUESTIONS COMPLETED SUOMIT ANSWER Are radon concentrations likely to be greater in the basement or on the top floor of a building? Choose one: O A. basement B. top floor C.equal concentrations D. not enough information 20F 14QUESTIONS COMPLETED 09/14> SUBMIT ANSWERExplanation / Answer
Calculate the density of radon at 321 K and 0.950 atm pressure
PV = nRT
where
P = pressure
V = volume
n = number of moles of gas
R = gas constant = 0.0821 L·atm/mol·K
T = absolute temperature
n / V = P / RT = (0.950 atm) / ((0.0821 Latm/Kmol) x (321 K)) = 0.0360 mol/L
Rn = 222 g/mol
(222 g/mol) x (0.0360 mol/L) = 7.99g/L--------------answer
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Radon concentration likely to be greater in the basement or on top floor of a building
a. basement –correct answer
Radon levels are highest in cellars and basements
Explanation
because these areas (basement or cellular) are nearest to the source and are usually poorly ventilated.