185k views
1 vote
If 19.9% of Boron is Boron-10 and 80.1% is Boron-11, what is the average atomic mass?

User SIMMORSAL
by
4.8k points

1 Answer

7 votes

Answer:

10.801=11

Step-by-step explanation:

avarage atomic mass =relative abundance of first isotope*mass number of first isotope/100+relative abundance of second isotope*mass number of second isotope/100

User Pedro Bernardes
by
4.6k points