Sulfur as 4 isotope 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

average atomic mass of sulfur = 32.066 amu

Explanation:

The average atomic mass is calculated as following:

average atomic mass = fraction of isotope (1) * mass number of the isotope (1) + fraction of isotope (2) * mass number of the isotope (2) + ... + fraction of isotope (n) * mass number of the isotope (n)

average atomic mass of sulfur = (95/100) * 32 + (0.76/100) * 33 + (3.22/100) * 34 + (0.89/100) * 36 = 32.066 amu

(amu - atomic mass units)