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Topic: percent abundance related ques  (Read 4517 times)

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Offline frogbank

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percent abundance related ques
« on: October 26, 2006, 11:04:20 PM »
here is question that really bother me

Copper (atomic mass 63.5) occurs in nature in the form of two isotopes, cu-63 and cu-65. Use this info to calculate the % abundance of each copper isotope .

how am i suppose to solve this without knowing one % abundance of isotope >:(
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Offline Mitch

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Re: percent abundance related ques
« Reply #1 on: October 26, 2006, 11:18:54 PM »
In a way you do, you know that the percentage of Cu-63 is equal to = [100% - percentage of Cu-65]
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Offline mike

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Re: percent abundance related ques
« Reply #2 on: October 26, 2006, 11:25:04 PM »
HINT:

63x + 65y =63.5

x + y = 1
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