The relative atomic mass of a naturally occ..

Question 1 Report

The relative atomic mass of a naturally occurring lithium consisting of 90% $\frac{7}{3}$ Li and 10% $\frac{6}{3}$ Li is

6.2

6.8

7.1

6.9

Answer Details

( $\frac{90}{100}$ x 7) + ( $\frac{10}{100}$ x 6)

= 6.3 + 0.6 = 6.9

The relative atomic mass of a naturally occurring lithium consisting of 90%73 7 3 Li and 10%63 6 3 Li is