Kinetics 1992

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The nucleidic ration,³H₁ to ¹H₁ is 8.0 x 10^-18:1.Tritium undergoes decay with the half life period of 12.3 yrs.How many tritium atoms would 10g of such a sample contain 40 yrs after original sample is collected ?

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virang1 Jhaveri ·2010-02-15 22:57:33

See
H3/H1 = 8.0*10^-18
H1 = k
H3 = 8.0*10^-18k
Therefore
k + 24*10^-18k = 10
k â‰ˆ10
Therefore initial H3 = 80*10^-18

k=0.693/12.3
kt = 2.303logA_i/A_f
t= 12.3/0.3010 (log80*10^-18/A)

Finally there will be 8*10^-18 atoms left

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Gone.. ·2010-02-15 23:01:06

virang ans given is 5.624 x 10⁵ atoms.

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Manmay kumar Mohanty ·2010-02-16 00:11:18

yaar virang 10^-18 atoms is absurd.

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1357

Manish Shankar ·2010-02-18 21:57:34

virang forgot some avagadro number there

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Kinetics 1992

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