Розподілити по класах такі речовини:
H2CO3, Al2O3, HgO ,
Fe(OH)3, H2S , CH4,
CuCl2, LiOH , PH3, Br2O7,
CO2, HPO3, Na2SO4,
CaO , KNO3, Cr2O3, SO2,
Al2( SO4)3, MgCO3,
Zn( NO 3)2 , HCl , Mg(OH)2
Cl2O7, PbS , SnO ,
NaOH , BaSO4, H2CO3.
NaCl ,SO3 , H2PO3,
ZnO , FeS , Rb2O ,
I2O7, CO , HNO3,KOH ,
H2S ,KI , Li2O ,Ca(OH )2, Rb2SO4, SiO2, MnO , Fe(NO)3 ,H2O, Fe(OH)3, CuI2, NO2 , AlPO4, MgCO3, B2O3, K2SiO3,
ZnSO3, Cu(OH)2, BeO
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