A Certain Radioactive Isotope Has a Rate Constant of Decay $\times$

question 19

Multiple Choice

A certain radioactive isotope has a rate constant of decay of 2.74 $\times$ 10^-2 min^-1.Calculate the time required for a sample of this isotope to decay to one-fourth of its initial value.

• A) 25.3 min
• B) 31.6 min
• C) 0.0548 min
• D) 50.6 min
• E) 2.74 min

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