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26-04-2024
Chemistry

Answered

The isotope cobalt-57 has a half-life of 272 d. How long will it take a sample of cobalt-57 to decay to 38% of its original activity? Radioactive decay follows first order kinetics.
(A) 103 d
(B) 337 d
(C) 188 d
(D) 380 d

Answer :

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