Determine the decay constant

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Reference no: EM13265116

A freshly prepared sample of a certain radioactive isotope has an activity of 11.2 mCi. After 4.40 h, its activity is 8.00 mCi.

(a) Find the decay constant.

s-1

(b) Find the half-life.

h

(c) How many atoms of the isotope were contained in the freshly prepared sample?


(d) What is the sample's activity 30.2 h after it is prepared?

mCi

Reference no: EM13265116

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