Question

A hypothetical element has an atomic weight of 42.8452 amu. There are three main isotopes of this element with mass numbers of 41, 43 and 44. The 44 amu isotope has a 8% abundance. What is the percent abundance of the isotope with the mass number of 41?

1. 7.740%
2. 12.04%
3. 92.26%
4. 46.00%
5. 12.34\%

Answer 1

Answer is 46.00%

Step-by-step explanation:

absolute mass= A1F1 +A2F2

100

42.8452= 44×8% + 41×( 100--F2)

100

so you get

F2= 46.00%

am not sure