Chemistry

I am supposed to find the percent abundancies of two isotopes. I am given the masses of both isotopes, along with the atomic mass. (This is a fictional element with only those two isotopes.) I am not given percentages for either isotope... how do I solve this?

  1. 👍 0
  2. 👎 0
  3. 👁 134
asked by Liz
  1. Well, if the Percent of A is A, then the percent of B is 1-A (decimal percents.)

    Then
    avgatomicmass=massA*precentA + massB(1-percentA)
    solve for percent of A.

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    The element X has an atomic mass of 12.80 amu. It is known to have two isotopes 12X and 13X. Which of the following is true about the relative abundancies of 12X and 13X? a) both isotopes occur with the same frequency. b)12X

    asked by Kayla on December 1, 2010
  2. chem

    The element X has an atomic mass of 12.80 amu. It is known to have two isotopes 12X and 13X. Which of the following is true about the relative abundancies of 12X and 13X? a) both isotopes occur with the same frequency. b)12X

    asked by nicki on December 1, 2010
  3. chemistry

    The element X has an atomic mass of 12.80 amu. It is known to have two isotopes 12X and 13X. Which of the following is true about the relative abundancies of 12X and 13X? a) both isotopes occur with the same frequency. b)12X

    asked by Dawn on December 2, 2010
  4. Chemistry

    Copper is composed of two naturally occurring isotopes: Cu−63 (69.170%) and Cu−65. The ratio of the masses of the two isotopes is 1.0318.

    asked by Vanessa on September 3, 2014
  5. honors chemistry- isotopes...

    can scientists actually measure the mass and relative abundance of isotopes of an element by counting each particle and measuring their masses? [ i think no because it would be too small ] if not, how could a scientist measure the

    asked by guitarking4000 on October 31, 2006
  6. chemistry

    the element boron has two naturally occurring isotopes with masses of 10.01amu and 11.01amu. What is the percent abundance of the first isotope.

    asked by Anonymous on September 19, 2007
  7. Chemistry (percent abundance) *emergency*

    If the average atomic mass of Br is 79.90 amu, what is the percent abundance of each of its isotopes? How would we figure out the isotopes first before we calculate the percent abundance??

    asked by Ray on December 12, 2016
  8. Chemistry

    The relative atomic mass of natural lithium is 6.95 it consist of two isotopes of relative masses 6.02 7.02 calculate the natural abundance of the isotopes

    asked by Mary on February 4, 2018
  9. Waves and optics

    Find the binding energy per nucleon in J and eV for the three following isotopes, given their atomic masses in u: 22(A) 6(Z) of carbon 22.0572097 u

    asked by maryam on May 20, 2016
  10. Chemistry

    Element X consists of two major isotopes with the following percent abundances and atomic masses: 35.0% and 85.0 amu; and 65.0% and 84.0 amu. Calculate the average atomic mass of element X.

    asked by Anonymous on October 26, 2014

More Similar Questions