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OpenStudy (anonymous):
Naturally occurring copper exists in two isotopic forms. 63 Cu and 65Cu. The atomic mass of copper is 63.55 amu. What is the approximate natural abundance of 63 Cu?
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OpenStudy (anonymous):
Let x = the percentage abundance of 63 Cu Then 1 - x = the percent abundance of 65 Cu (because 1 = 100%) 63x + 65(1-x) = 63.55
OpenStudy (anonymous):
got .725
OpenStudy (anonymous):
yeah so it's 72.5%
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