A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
Lithium has two isotopes.
Li6 and Li7.
Li6 mass = 6.015121amu
Li7 mass = 7.016003amu
Lithium Mass = 6.94049amu
What is percent abundance of Li6?
I know that there is an equation:
6.9409 = (% Abundance Li6 * Weight of Li6) + (% Abundance Li7 * Weight of Li7)
I don't know how to use it.
anonymous
 4 years ago
Lithium has two isotopes. Li6 and Li7. Li6 mass = 6.015121amu Li7 mass = 7.016003amu Lithium Mass = 6.94049amu What is percent abundance of Li6? I know that there is an equation: 6.9409 = (% Abundance Li6 * Weight of Li6) + (% Abundance Li7 * Weight of Li7) I don't know how to use it.

This Question is Closed

JFraser
 4 years ago
Best ResponseYou've already chosen the best response.0you have all 4 pieces, plug them in

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Okay. SO 6.9409 = % Li6 * 6.015121 + % Li7 * 7.016003 But this gives me two variables...

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0100% is the sum of the two. 100% = Li 6 + Li 7 Li 6 = 100% Li7

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0So 6.409 = %Li6 * 6.015121 + (100%  %Li6) * 7.016003 Confused... 100% * 7.016003 = 701.6003? That is a big number.

Xishem
 4 years ago
Best ResponseYou've already chosen the best response.0Well ask yourself if this statement makes sense: The percent abundance of Li6 is 701.6%.
Ask your own question
Sign UpFind more explanations on OpenStudy
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
 Engagement 19 Mad Hatter
 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.