17. From the isotopic composition given in the table below, calculate the average atomic mass of chlorine. & Chlorine-35 & Chlorine-37 Atomic Mass & 34.969 & 36.966 Abundance & 75.78 % & 24.22 % 34.969 mathrm(amu) 35.453 mathrm(amu) 36.966 mathrm(amu) 35.000 mathrm(amu)

## Step 1: Understand the Concept of Average Atomic Mass### The average atomic mass of an element is calculated by taking into account the masses of its isotopes and their relative abundances. The formula used is: ## Step 2: Convert Abundances to Decimal Form### The given abundances are in percentage form, so we need to convert them to decimal form for calculation:- For Chlorine-35: - For Chlorine-37: ## Step 3: Calculate Contribution of Each Isotope### Multiply the atomic mass of each isotope by its abundance (in decimal form):- Contribution of Chlorine-35: - Contribution of Chlorine-37: ## Step 4: Sum the Contributions to Find the Average Atomic Mass### Add the contributions from both isotopes to find the average atomic mass: ## Step 5: Compare with Given Options### The calculated average atomic mass is approximately amu, which matches one of the provided options.