Помогите срочно!!!!!!!!
Распределите вещества по классам.
H2SO4,Na,CO3,SO2,CuO,HPO3,P2O3,Zn(OH)2,KOH,CA(NO)2,KC1,MgCL2,CU(OH)2,BaO,HBr,CL2O7,FeCl3,NaOH,HCI,HgCl2Zn(NO3)2
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