A $1.0$ -Mol Sample of an Isotope Is Decaying with a Half-Life

question 88

Short Answer

A $1.0$ -mol sample of an isotope is decaying with a half-life of $28 \mathrm { y }$ . After $61 \mathrm { y }$ , how man moles of this isotope are left and what is its activity in Bq?

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