If the average atomic mass fo chlorine is 35.5 then find the percentage abundance of the two isotopes of chlorine which have the mass number 35 and 37.

Explanation

To find the percentage abundance of the two isotopes of chlorine (Cl-35 and Cl-37) given that the average atomic mass of chlorine is 35.5, we can follow these steps:

### Step 1: Define Variables
Let:
- \( X \) = percentage abundance of Cl-35
- \( 100 - X \) = percentage abundance of Cl-37

### Step 2: Set Up the Equation
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