A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ilovebmth1234

  • one year ago

Thallium consists of about 30% Th-203 and 71% Th-205. The relative mass will be closest to what value? Question 5 options: A) 201 B) 202 C) 203 D) 204

  • This Question is Closed
  1. ilovebmth1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @BioHazard9064 @arronq

  2. aaronq
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    This involves some simple math. The molar mass of an element (as listed on the periodic table) accounts for all the isotopes of that element in a weighted average according to their abundance in nature. \(\sf Molar~mass=\sum(abundance~~\%*m_{isotope~i})\) \(\sf Molar ~mass_{Th}=0.3*m_{Th-203} + 0.71*m_{Th-205} \)

  3. ilovebmth1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ummm okay

  4. aaronq
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    So all you do is multiply the abundance of each isotope by it's respective mass then add these values together.

  5. aaronq
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    The mass is indicated after the dash. For example, the mass of Th-203 is 203 lol

  6. ilovebmth1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so D?

  7. aaronq
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    sounds right

  8. ilovebmth1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks

  9. aaronq
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    no probs

  10. ilovebmth1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i got a couple more questions are you busy?

  11. aaronq
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    nope, post them

  12. ilovebmth1234
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay thank you

  13. 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.