Question

The average atomic mass of an element X is 16.2 units.What is the percentage of isotope for 168 X and 188 X in the sample

Answer 1

let atomic mass of 16 is (x) and 18 is (100-x).

so equation=16*x+18*(100-x)/100=16.2

16x+1800-18x=1620

-2x=-180

x=90%

100-x=10%