Question

1. determine the average atomic mass for chlorine: 1. mass of 34.969amu and 75.77% 2. mass of 36.966amu and 24.23%

Explanation:

Step1: Multiply first isotope mass by its abundance

$34.969\times0.7577$

Step2: Multiply second isotope mass by its abundance

$36.966\times0.2423$

Step3: Sum the results

$(34.969\times0.7577)+(36.966\times0.2423)$

Answer:

$35.453$ amu