Question

What is the average atomic mass of chlorine given in the following two naturally occurring isotopes and their percentage abundance the first isotope is CL 35 with the abundance of 75.77% and the second isotope is CL with 37 with a naturally abundance of 24.23

Answer 1

The average atomic mass of chlorine, calculated using the atomic masses and percent abundances of its isotopes, chlorine-35 and chlorine-37, is 35.45 amu.

Step-by-step explanation:

The average atomic mass of chlorine is calculated by multiplying the atomic mass of each isotope by its percentage abundance (expressed as a decimal), and then adding these values together. For chlorine-35 with an atomic mass of 34.969 amu and a percent abundance of 75.77%, and chlorine-37 with an atomic mass of 36.966 amu and a percent abundance of 24.23%, the calculation is as follows:

(34.969 amu × 0.7577) + (36.966 amu × 0.2423) = 26.50 amu + 8.95 amu = 35.45 amu

Therefore, the average atomic mass of chlorine is 35.45 amu.