Question

Be sure to answer all parts. Radon (Rn) is the heaviest and the only radioactive member of Group 8A(18), the noble gases. It is a product of the disintegration of heavier radioactive nuclei found in minute concentrations in many common rocks used for building and construction. In recent years, health concerns about the cancers caused from inhaled residential radon have grown. If 1.00 x 1015 atoms of radium (Ra) produce an average of 1.373 x 104 atoms of Rn per second, how many liters of Rn, measured at STP, are produced per day by 6.10 g of Ra? 1 * 10L Rn/day

Answer 1

Clo 23 moles of Ra = 6.10 = 0.027 mole. 226 No. of alom of Ra = 0.027X 6.022x10. = 1.6254 x 1022 ahom 10's atoms of Re produce 1.373x10" aloms of Ron sead. So, 1.6254 x 1022 alom will produce aloms of Rn persecond - 1.373x 109 x 1.6254x1022 - 2.2317810" alom per second In aday (86400 second) il-will produce Rosa - 2.23 17 X10' x 86400 - 1.928 x 100 anom moles of kn = 1.9288 100 3.202 x 10 male 6.022 x 1023 s MRT 3.2008 108 0.082 X 273.15 olunes SO Р- 1.oo » 7.1728 107 L Rn/day Ronday

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