28·0,9298 = 25,8384
29·0,0467 = 1,3543
30·0,0305 = 0,9150
Mr(Si) = 25,8384 + 1,3543 + 0,9150 = 28,1070
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28·0,9298 = 25,8384
29·0,0467 = 1,3543
30·0,0305 = 0,9150
Mr(Si) = 25,8384 + 1,3543 + 0,9150 = 28,1070