Ответ: 30,19 %
K3PO4
Mr(K3PO4) = 39×3 + 31 + 16×4 = 212
W(O) = (16×4) : 212 × 100% = 30,19 %
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Ответ: 30,19 %
K3PO4
Mr(K3PO4) = 39×3 + 31 + 16×4 = 212
W(O) = (16×4) : 212 × 100% = 30,19 %