Ответ:
M(P2O5) = 142 г/моль
W(P) = 31 * 2 / 142 * 100 % = 43,66 %
W(O) = 16 * 5 / 142 * 100 % = 56,34 %
M(H3PO4) = 3 + 31 + 64 = 98 г/моль
W(P) = 31 / 98 = 0,31 = 31 %
W(O) = 64 / 98 = 0,65 = 65 %
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Ответ:
M(P2O5) = 142 г/моль
W(P) = 31 * 2 / 142 * 100 % = 43,66 %
W(O) = 16 * 5 / 142 * 100 % = 56,34 %
M(H3PO4) = 3 + 31 + 64 = 98 г/моль
W(P) = 31 / 98 = 0,31 = 31 %
W(O) = 64 / 98 = 0,65 = 65 %