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24 December, 17:51

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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  1. 24 December, 21:01
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    The weighted average atomic mass of Silicon is 28.1

    (27.98 x. 9223) + (28.98 x. 0468) + (29.97 x. 0309)

    = 25.81 + 1.36 +.93

    = 28.1
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