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The Radioactive Isotope Tritium Decays with a First-Order Rate Constant

Question 68

Multiple Choice

The radioactive isotope tritium decays with a first-order rate constant k of 0.056 yr-1.What fraction of the tritium initially in a sample is still present 30.years later?


A) 0.19
B) 0.60
C) 0.15
D) 2.8 × 10-38
E) 0.81

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