Sulfur has 4 isotopes: sulfur-32 is 95.0%, sulfur-33 is 0.76%, sulfur-34 is 3.22%, and sulfur-36 is 0.89% abundant. calculate its average atomic mass. express your answer with five sig figs.

- Average atomic mass is 32.066.

Solution:- To calculate the average atomic mass the percentages of the isotopes are converted to decimals and multiplied by their respective isotopic masses. We do this for all the isotopes and take the sum as:

average atomic mass = 32(0.95)+33(0.0076)+34(0.0322)+36(0.0089)

= 30.4+0.2508+1.0948+0.3204

= 32.066

So, the atomic mass of sulfur is 32.066.

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