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QUESTION
Chlorine consist of two isotopes one is cl-35 which has the mass of 34.97 and natural abundance of 75.77% the second is cl -37 the mass of 36.96 and natural abundance of 24.2% calculate the average mass of chlorine?
##~=35.44##
In cases like this, we use the weighted arithmetic mean:
##barX~=(34.97*75.77%+36.96*24.20%)/(100%)##
##barX~=(2649.6769%+894.4320%)/(100%)##
##barX~=(3544.1089%)/(100%)##
##barX~=35.44##
