March 29, 2024, 02:35:05 AM
Forum Rules: Read This Before Posting


Topic: percent abundance related ques  (Read 4207 times)

0 Members and 1 Guest are viewing this topic.

Offline frogbank

  • Very New Member
  • *
  • Posts: 1
  • Mole Snacks: +0/-0
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 >:(

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5298
  • Mole Snacks: +376/-3
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
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]
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

Offline mike

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 1245
  • Mole Snacks: +121/-35
  • Gender: Male
Re: percent abundance related ques
« Reply #2 on: October 26, 2006, 11:25:04 PM »
HINT:

63x + 65y =63.5

x + y = 1
There is no science without fancy, and no art without facts.

Sponsored Links