Francium -233 has a half-life of 21.80min.  I).  How many nuclei are initially present in a 25.0mg sample of Francium-233  ii).  What is its initial activity?  iii).  How many nuclei will be present 1hr and 49min late

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A: c) one curie is 3.7 x 1010Bq converting 0.05 micro curie we get, 0.05 μCi = 0.05 x 10-6 x 3.7 x…

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Q: Natural uranium ore contains about 0.720% of the fissile uranium- 235 isotope. Suppose a sample of…

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Q: element

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A: Decay reaction can be represented as follows. U92238 → XZA +8 He24 +6 e-10

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A: Nucleus of 16 B ( Z = 5 )

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Q: A. B. Use the worked example above to help you solve this problem. The half-life of the radioactive…

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Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.90 billion years old by…

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Q: Natural uranium ore contains about 0.720% of the fissile uranium - 235 isotope. Suppose a sample of…

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Q: a) What is the decay constant of fluorine-17 if its half-life is known to be 66.0 s? = b) How long…

A: Given value---  Half life time of F-17 (t 1/2) = 66 sec. We have to find---  What is the decay…

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Q: Question 1. Tritium has a a tritium sample will remain (a) after 5.00 yr?

A: GivenHalf Life for Tritium, t1/2=12.33 years