Формулы только основных оксидов приведены в ряду:
1. SO₂, BaO, Cl₂O₇
2.CaO, Na₂O, Rb₂O
3.SO₂, CO₂, P₂O₅
4.P₂O₃, MgO, HgO
1. SO₂, BaO, Cl₂O₇
2.CaO, Na₂O, Rb₂O
3.SO₂, CO₂, P₂O₅
4.P₂O₃, MgO, HgO
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