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A Tiny Speck (8

Question 131

Multiple Choice

A tiny speck (8.3*10-7 mol) of radioactive americium-241 is used in smoke detectors. How many atoms of americium-241 are there in one of these smoke detectors?


A) 5.0 * 1017
B) 1.2 * 1020
C) 2.9 * 1022
D) 6.0 * 1023
E) 8.3 * 107

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