The table below gives the data that is needed to calculate the average atomic mass of element

b. isotopeatomic mass (amu) relative abundance (%) b-1010.0119.91b-1111.0180.09based on these data, what is the average atomic mass of element b?10.0110.5110.8111.01

There are 2 isotopes for element b.

1. Isotope has mass 10.01 and abundance of 19.91%

2. Isotope has mass of 11.01 and abundance of 80.09%

The average atomic mass is the weighted average mass of the element.

Average Atomic mass = 10.01 * 19.91% + 11.01 * 80.09%

Average atomic mass = 1.99 + 8.817 = 10.81

Answer is 10.81