It is found that 2.0 x 10-5 mol 222Rn (t1/2 = 3.82 d, atom mass = 222) has seeped into a close basement with a volume of 2.0 x 10° m°. What is the initial activity of the radon (in events Ls1)? A. 3.8648 x 10° events Ls1 B. 1.2644 x 107 events L1s1 C. 2.4111 x 10° events Ls1 D. 3.7249 x 106 events L1s1

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It is found that 2.0 x 10-5 mol 222Rn (t1/2 = 3.82 d, atom mass = 222) has seeped into a closed
basement with a volume of 2.0 x 10³ m3.
%3!
What is the initial activity of the radon (in events L-15-1)?
A. 3.8648 x 108 events L1s1
B. 1.2644 x 107 events L1s1
C. 2.4111 x 10' events L1s1
D. 3.7249 x 106 events L-1s1
Transcribed Image Text:It is found that 2.0 x 10-5 mol 222Rn (t1/2 = 3.82 d, atom mass = 222) has seeped into a closed basement with a volume of 2.0 x 10³ m3. %3! What is the initial activity of the radon (in events L-15-1)? A. 3.8648 x 108 events L1s1 B. 1.2644 x 107 events L1s1 C. 2.4111 x 10' events L1s1 D. 3.7249 x 106 events L-1s1
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