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castortr0y [4]
3 years ago
13

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has e

lapsed?
Chemistry
1 answer:
Alexxx [7]3 years ago
8 0

7.2 / 2.4 = 3 half-lives

(1/2)3 = 0.125 (the amount remaining after 3 half-lives)

100.0 g x 0.125 = 12.5 g remaining

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