Problem

Silicon has three naturally occurring isotopes: Si-28 that has a percent abundance of 92...

Silicon has three naturally occurring isotopes: Si-28 that has a percent abundance of 92.23% and a mass of 27.977 amu, Si-29 that has a 4.68% abundance and a mass of 28.976 amu, and Si-30 that has a 3.09% abundance and a mass of 29.974 amu. Calculate the atomic mass for silicon using the weighted average mass method.

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