Ион алюминия имеет число электронов - 10, заряд ядра у алюминия +13
Mr(Al2(SO4)3) = 27 *2 + 32 *3 + 16 * 12 = 342
W(Al) = Ar(Al) * n / Mr(Al2(SO4)3) *100% = 27 *2 / 342 *100% = 15,79 %
W(S) = Ar(S) *n / Mr(Al2(SO4)3) * 100% = 32 * 3 / 342 *100% = 28,07 %
W(O) = Ar(O) * n / Mr(Al2(SO4)3) * 100% = 16 * 12 / 342 *100% = 56,14%
<span>C6H8O7 + 3NaHCO3 = 3CO2 + 3H2O + Na3C6H5O7</span>
<span>4P+ 5O2 -->2P2O5 </span>
<span>P2O5 + 3 H2O ->H3PO4 </span>
<span>2H3PO4 + 3Ca(OH)2->Ca3(PO4)2 + 6H2O</span>
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