Radon-222 has a half-life of 3.82 days. How many alpha emissions are produced when a 10 g sample of radon-222 decays over 19.1 days?
A) 3.39 × 1020 emissions
B) 8.47 × 1020 emissions
C) 5.42 × 1021 emissions
D) 2.62 × 1022 emissions
E) 4.18 × 1025 emissions
Correct Answer:
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