(II) Calculate the mass of a sample of pure is 1.248 X 109

Chapter 30, Problem 47P

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\(\text { (II) }\) Calculate the mass of a sample of pure \({ }_{19}^{40} K\) with an initial decay rate of  \(2.4 \times 10^{5} s^{-1}\). The half-life of \({ }_{19}^{40} K \text { is } 1.248 \times 10^{8} y r\).

Equation Transcription:

Text Transcription:

(II)

19 ^ 40K

2.4 x 10^5s^-1

19^40 K is 1.248 x 10^8yr

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