Распределите по классам следующие соединения:Al^2O^3,H^3PO^4,Na^2SO^3,H^2CO^3,S^2O,Cl^2O^7,BaSo^4,H^2SO^4,Ca(OH)^2Mg(OH)^2,NaNO^3,NO^2,Mn^2O^7,Kl.

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Срочно!!!ПОМОГИТЕЕ
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