Question

PLS HELP!!!( pls be 100% of your answer)Chlorine is made up of two isotopes. 35Chlorine makes up 75.8% of chlorine and 37Chlorine makes up 24.4%. What is the average atomic mass for chlorine? (assume chlorine-35 has a weight of 35 amu and chlorine-37 has a mass of 37 amu)

37.000 amu
35.000 amu
35.558 amu
34.969 amu

Answer 1

Answer:

35.558 amu

Explanation:

Complete this calculation

$\frac{isotope \times \: abundance}{100} + \frac{isotope \times \: abundance}{100}$

$\frac{35 \times 75.8}{100} + \frac{37 \times 24.4}{100} = 35.558$

Therefore the answer is 35.558 amu