Question: A scientist has a 2 . 3 - gg sample of pure strontium - 9 1 , 3 8 9 1 Sr . The half

A scientist has a 2.3-gg sample of pure strontium-91,3891Sr. The half-life of strontium-91 is 9.70h. Determine its decay constant in units of s1. Determine the initial number of nuclei strontium-91 nuclei initially in the sample.

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