Question

Relative abundance of 2 isotopes of Neon Ne 20 and Ne22
are in 9:1 ratio find its average atomic mass.​

Answer 1

9 : 1

Let, the w% of

20

Ne=x

w% of

22

Ne=100−x

20.2=

100

x×20+(100−x)×22

2020=20x+2200−22x

2x=2200−2020=180

x=90%

∴ w% of

20

Ne=90%

w% of

22

Ne=10%

The ratio of the relative abundances of the isotopes is:

∴

20

Ne :

22

Ne

=9:1

Explanation:

I hope it this answer is correct