Answer:
32.06 amu
Explanation:
(0.9499 * 31.972) + (0.0075 * 32.971) + (0.0425 * 33.968) + (0.0001 *35.967) =
32.06
Considering the definition of atomic mass, isotopes and atomic mass of an element, the atomic mass of sulfur is 32.06 amu.
The isotopes of an element are those in which its atomic numbers (that is, the number of protons) are the same, but the number of neutrons is different. Remember that protons and neutrons are in the nucleus of the element.
When the mass of a chemical element is fractional, it indicates that said element will be made up of a mixture of its different isotopes. So the average atomic mass of an element is calculated based on the abundance and mass of its isotopes.
In this case, you know the following isotopes and its abundance:
Then, the average atomic mass is calculated as:
atomic mass= 0.9499×31.972 amu+ 0.0075×32.971 amu + 0.0425×33.968 amu + 0.0001×35.967 amu
atomic mass= 32.06 amu
Finally, the atomic mass of sulfur is 32.06 amu.
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