C See page 454 04 Question ( point) Radon is a naturally occurring radioactive g

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C See page 454 04 Question ( point) 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 signifcant risk factor for lung cancer 1st attempt Part 1 (0.5 point) Al Se Periodic Table Se Hint Calculate the density of radon at 311 K and 0.900 atm of pressure. g/L 0 See Hint Part 2 (0.5 point) Are radon concentrations likely to be greater in the basement or on the top floor of a building? Choose one: A basement B. top floor O C. equal concentrations

Explanation / Answer

Solution:- (part 1) The equation to calculate the gas density is, d = PM/RT

where d is the density, P is atmospheric pressure, M is molar mass, R is universal gas constant and T is kelvin temperature.

d = (0.900 atm x 222 g/mol)/(0.0821 atm.L/mol.K x 311 K)

d = 7.83 g/L

(part 2):- The concentration of Radon is higher in the basement as It's released from Radium present in the soil. From above density formula, density (concentration in gram per liter) is directly proportional to the pressure. Pressure is higher at lower altitude.

So, first one is the right choice.

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