calculate the atomic weight of silicon on the basis of the following percent com

Question

calculate the atomic weight of silicon on the basis of the following percent compositions and atomic weight of the naturally occurring isotopes. Silicon-28= 92.21% Silicon-29=4.70% Silicon-30 = 3.09% calculate the atomic weight of silicon on the basis of the following percent compositions and atomic weight of the naturally occurring isotopes. Silicon-28= 92.21% Silicon-29=4.70% Silicon-30 = 3.09% calculate the atomic weight of silicon on the basis of the following percent compositions and atomic weight of the naturally occurring isotopes. Silicon-28= 92.21% Silicon-29=4.70% Silicon-30 = 3.09%

Explanation / Answer

MW avg = x1*MW1 +  x2*MW2+  x3*MW3

MW avg = 0.9221*28+  0.047*29+  0.0309*30

MW avg = 28.1088 amu

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