Question

ay Natwally occurring boron consists of
tuo usodopes whose odemic eleighis core
tool and 11.01 the atomic weight of
boolon is 10.81 calculate the percentage of
each isotope​

Answer 1

Answer:

Let the percentage of boron isotope with atomic weights 10.01 be x% and that of atomic weight 11.01 be (100-x)%. Average atomic mass of boron is 10.81.

Average atomic mass =

100

Atomic weight of first isotope×x+atomic weight of second isotope×(100−x)

10.81=

100

10.01x+11.01×(100−x)

x=20

(100−x)=80

Hence, natural abundance of isotope with atomic weight 10.01 is 20%

natural abundance of isotope with atomic weight 11.01 is 80%