Answer:
Z=22.70
Explanation:
It is given that,
An element Z that has two naturally occurring isotopes with the following percent abundances as follows :
The isotope with a mass number 22 is 65.0% abundant; the isotope with a mass number 24 is 35.0% abundant.
The average atomic mass for element Z is given by :
[tex]Z=\dfrac{22\times 65+24\times 35}{100}\\\\Z=22.7[/tex]
So, the average atomic mass for element Z is 22.70.
