Carbon (Z=6) with mass number 11 decays to boron (Z=5). The half-life of the decay scheme is 20.3 minutes. How much time will elapse before a mixture of 90% carbon−11 and 10% boron−11 (by the number of atoms) converts itself into a mixture of 10% carbon−11 and 90% boron−11?(ln19=−2.1972)

Carbon (Z=6) with mass number 11 decays to boron (Z=5). The half-life

1.	Carbon (Z=6) with mass number 11 decays to boron (Z=5). The half-life of the decay scheme is 20.3 minutes. How much time will elapse before a mixture of 90% carbon−11 and 10% boron−11 (by the number of atoms) converts itself into a mixture of 10% carbon−11 and 90% boron−11?(ln19=−2.1972)
Answer» Carbon $(Z = 6)$ with mass number $11$ decays to boron $(Z = 5) .$ The half-life of the decay scheme is $20.3 minutes$ . How much time will elapse before a mixture of $90 % carbon - 11$ and $10 % boron - 11$ (by the number of atoms) converts itself into a mixture of $10 % carbon - 11$ and $90 % boron - 11 ?$ $(ln \frac{1}{9} = - 2.1972)$

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Carbon (Z=6) with mass number 11 decays to boron (Z=5). The half-life of the decay scheme is 20.3 minutes. How much time will elapse before a mixture of 90% carbon−11 and 10% boron−11 (by the number of atoms) converts itself into a mixture of 10% carbon−11 and 90% boron−11?(ln19=−2.1972)

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