75% of CI atoms have a mass number of 32, whilst the remaining 25% have a mass number of 40. What is the relative atomic mass of chlorine? Give exact answer. Relotive otomic moss=

## Step1: Atomic mass is calculated by using the formula:### \( Atomic \ mass \ = \ (Relative \ abundance \ of \ isotope_{1} • mass \ of \ isotope_{1}) + (Relative \ abundance \ of \ isotope_{2} • mass \ of \ isotope_{2}) \)This formula ensures the calculation of a weighted average to determine the mass of the amyl in its naturally occurring form.## Step2: The relative abundance of each isotope is given as a percentage. Convert these to a fraction by dividing each by 100.## Step3: The atomic masses of the two isotopes Chlorine (Cl) are given in the question as 32 and 40. Insert these values into the atomic mass calculation indicating that 75% have a mass of 32 (0.75 * 32) and 25% a mass of 40(0.25 * 40).## Step4: Solve the equation to deduce the theoretical atomic mass of chlorine.# Calculation: Calculate .