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General Chemistry

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Finding Average Atomic Mass Of Isotopes

CHEM-NHTBEQ

Two isotopes of sulfur were discovered on a distant planet. The isotopes, $_{ 16 }^{ 32 }{ S }$ and $_{ 16 }^{ 34 }{ S }$, have masses of 31.873 amu (71.07%) and 33.912 amu (28.93%) respectively.

Calculate the average atomic mass of sulfur on this planet based on the abundance of the isotopes given in parenthesis.

A

22.89 amu

B

32.07 amu

C

32.46 amu

D

32.58 amu