W(э) = Ar(э) * n / M(в-ва) * 100%
W(Si) = 28 * 1 / 60 * 100%= 46%
W(O) = 16 * 2 / 60 * 100% = 54%
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W(э) = Ar(э) * n / M(в-ва) * 100%
W(Si) = 28 * 1 / 60 * 100%= 46%
W(O) = 16 * 2 / 60 * 100% = 54%