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A Rock Sample Containing an Isotope with a Half-Life of 12

Question 44

Multiple Choice

A rock sample containing an isotope with a half-life of 12 million years has an initial mass of 72 grams. How much of the daughter isotope will be present after three half-lives?


A) 4.5 grams
B) 9 grams
C) 18 grams
D) 54 grams
E) 63 grams

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