Final answer:
The atomic weight of Chlorine can be calculated by considering the percent abundances and atomic masses of its two naturally occurring isotopes, chlorine-35 and chlorine-37. By calculating the mass contributions of each isotope and adding them together, we find the average atomic mass of Chlorine to be 35.41 amu.
Step-by-step explanation:
The atomic weight of Chlorine can be calculated by considering the percent abundances and atomic masses of its two naturally occurring isotopes, chlorine-35 and chlorine-37.
Step 1: Calculate the mass contribution of chlorine-35 to the average relative atomic mass. 75.78% of the chlorine atoms has a mass of 35 amu. The contribution of Cl-35 is calculated as (75.78 x 35) / 100 = 26.443 amu.
Step 2: Calculate the mass contribution of chlorine-37 to the average relative atomic mass. 24.22% of the chlorine atoms has a mass of 37 amu. The contribution of Cl-37 is calculated as (24.22 x 37) / 100 = 8.967 amu.
Step 3: Add up the mass contributions of the two isotopes to find the average atomic mass of Chlorine. The atomic weight of Chlorine is the sum of the contributions from Cl-35 and Cl-37: 26.443 amu + 8.967 amu = 35.41 amu.