Turn on thread page Beta

A-level chemistry help watch

Announcements
    • Thread Starter
    Offline

    18
    ReputationRep:
    Could someone help me with this question?

    Silver has a relative atomic mass of 107.868. it has two naturally occurring isotopes: one with a relative abundance of 56.6% and a mass number of 107. What is the mass number of the other isotope?

    Thanks, p.s. (chemist boy are you there?)
    • Thread Starter
    Offline

    18
    ReputationRep:
    anyone?, this is kind of urgent.
    • Thread Starter
    Offline

    18
    ReputationRep:
    Please help, don't ignore me.
    • Thread Starter
    Offline

    18
    ReputationRep:
    does anyone do chemistry?
    Offline

    2
    ReputationRep:
    (Original post by Widowmaker)
    does anyone do chemistry?
    Yes - I get the answer to be 109 AMU:

    (107 * 0.566) + (X * [1 - 0.566]) = 107.868
    X = 109

    Ben
    • Thread Starter
    Offline

    18
    ReputationRep:
    (Original post by Ben.S.)
    Yes - I get the answer to be 109 AMU:

    (107 * 0.566) + (X * [1 - 0.566]) = 107.868
    X = 109

    Ben
    Thanks a lot.
 
 
 

University open days

  • Sheffield Hallam University
    City Campus Undergraduate
    Thu, 13 Dec '18
  • University of Buckingham
    Open Evening Undergraduate
    Thu, 13 Dec '18
  • University of Lincoln
    Mini Open Day at the Brayford Campus Undergraduate
    Wed, 19 Dec '18
Poll
Were you ever put in isolation at school?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.