Укажіть ряд з хімічними формулами солей:
а) Na2СО3, K2S, CaО;
б) CaSО4, Cu(NО3)2, Na2SiО3;
в) Ca3 (PО4)2 , NaOH, BaCО3;
г) NaNО3, K2SО3, H2CО3.
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