Chemical Forums

Chemistry Forums for Students => High School Chemistry Forum => Topic started by: frogbank on October 26, 2006, 11:04:20 PM

Title: percent abundance related ques
Post by: frogbank 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 >:(

Title: Re: percent abundance related ques
Post by: Mitch 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]

Title: Re: percent abundance related ques
Post by: mike on October 26, 2006, 11:25:04 PM

HINT:

63x + 65y =63.5

x + y = 1