Silicon has three naturally occurring isotopes. Silicon-28 has a mass of 27.98 and a relative abundance of 92.23%. Silicon-29 has a mass of 28.98 and a relative abundance of 4.68%. Silicon-30 has a mass of 29.97 and a relative abundance of 3.09%. What is the weighted average atomic mass of silicon?

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anonymous · Answer

in a population of 100 penguins, 92 out of 100 weigh 28 kilos, 5 weigh 29 kilos, and 3 weigh 30 kilos. how should we estimate the average weight of a penguin in this population?