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gs and Units! Question 1 2 pts A pure sample of Ra-226 contains 2.0 x 1014 atoms of the isotope. If the half-life of Ra-226

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gs and Units! Question 1 2 pts A pure sample of Ra-226 contains 2.0 x 1014 atoms of the isotope. If the half-life of Ra-226 is 1.6 x 103 years and the decay constant is 0.000436 years, what is the decay rate of this sample? O 6.7 x 109 decays/year 9.4 x 10-10 decays/year 8.7 x 10.10 decays/year 13 x 10 10 decays/year

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