Question

boron average atomic mass 10.8.it has two isotopes atomic mass 10 and 11 find the percentage of average atomic mass 10​

Answer 1

Let %(10mass)= x

%(11 mass)= 100-x

10.8= [10x + 11(100-x)]/100

1080-1100 =10x-11x

x = 20%

So %(10 mass)= 20%

Hope this helps you!!!!