Problema Solution
Chlorine35 has a mass of 34.97amu and chlorine37 has a mass of 36.95amu.Determine the atomic mass of chlorine Cl(Atomic # 17) if 75.53% of all chlorine atoms are chlorine 35 isotope and 24.47% are chlorine 37 isotope
Answer provided by our tutors
We can use the weighted average to determine the mass of Cl. We can write this as:
atomic mass of Cl= [.7553 (34.97)+ .2447(36.95)]/1
atomic mass of Cl= 35.45 amu
where we turned the percentages into decimals format by moving the decimal over two spaces to the left. We then multiplied the corresponding decimals with the masses that were given in the problem.