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Thallium-228 has a half-life of 3.053 min. How long will it take for 120.0 g to decay to 7.50 g?

1 Answer

5 votes

i would put

answer: 12.212 or if fraction 12 53/250!

explanation: 7.5 = 120 x (1 ÷ 2) x ÷ 3.053

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User Tsakoyan
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