Question

Вычислите мaссовые доли всех элементов в H3PO4

Answer 1

Mr(H3PO4) = 98

W(H) = Ar(H) * n / Mr(H3PO4) * 100% = 1 *3 / 98 *100% = 3%

W(P) = Ar(P) * n / Mr(H3PO4) * 100% = 31 / 98*100% =31,6%

W(O) = Ar(O) * n / Mr(H3PO4) * 100% = 16*4 / 98 * 100% = 65,3%