Atomic Weight: Exercise with solution

Questions

Naturally occurring Chlorine is 75.78% 35Cl, which has an atomic mass of 34.969 amuand 24.22 % 37Cl,

  1. Which one has an atomic mass of 36.966 amu?
  2. Calculate the average atomic mass (atomic weight) of Cl

Solution:

Atomic weight = average atomic mass = [35 × (75.78 &$47; 100)] + [37 × (24.22 / 100)]= 35.484 amu




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