Textbook ExpertVerified Tutor
2 Nov 2021
Given information
Boron has two naturally isotopes.
Mass of boron-
is 
amu.
Mass of boron-
is 
amu.
Step-by-step explanation
Step 1.
Let the fractional abundance of boron- isotope be 
Let the fractional abundance of boron- isotope be 
we know that, average atomic mass of boron is 
amu
It is given that,
Atomic Mass of boron- is amu.
Atomic Mass of boron- is amu.
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