A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

Lithium has two isotopes. Li-6 and Li-7. Li-6 mass = 6.015121amu Li-7 mass = 7.016003amu Lithium Mass = 6.94049amu What is percent abundance of Li-6? I know that there is an equation: 6.9409 = (% Abundance Li-6 * Weight of Li-6) + (% Abundance Li-7 * Weight of Li-7) I don't know how to use it.

  • This Question is Closed
  1. JFraser
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you have all 4 pieces, plug them in

  2. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay. SO 6.9409 = % Li-6 * 6.015121 + % Li-7 * 7.016003 But this gives me two variables...

  3. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    100% is the sum of the two. 100% = Li 6 + Li 7 Li 6 = 100% Li7

  4. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So 6.409 = %Li-6 * 6.015121 + (100% - %Li-6) * 7.016003 Confused... 100% * 7.016003 = 701.6003? That is a big number.

  5. Xishem
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Well ask yourself if this statement makes sense: The percent abundance of Li-6 is 701.6%.

  6. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.