За дания: A) Составьте формулы по валентности. Б) Найдите валентность по формуле. Номер варианта a 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 HO MgO NaO CuO KO FeCl Fe(III); CI(0) AIO NaS S(11) Br(I Si (IV) AlBr SiH SO PO NH NO Cro NiO PH NO S(IV) NIO KS P(V) N(III) N(II) Cr(VI) Ni(III) P(III) N(IV) NaBr MgS S(II) ZnCl CI(I) CO C(IV) CrCl Cr(III) Ni(III) S(II) B 6 CaO Li₂O H₂S HgO MgCl B₂03 ZnO NICI r Ag₂0 SO3 Na₂0 Cr₂O3 V₂05 CaCl₂ ZnS As₂Os AIH3 WO₂ SeO3 AICI CO₂O3 HBr Fe₂O3 CH4 SnO₂​
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