Kislorodning nisbiy atom massasi?, 16, 8, 32, 18, Uglerodning kimyoviy belgisi?, H, C, O, U, Karbonat angdrid formulasi?, CO, NO2, NaO, CO2, CaO ning nisbiy molekulyar massasi?, 48, 56, 112, 28, Alyuminiyning valentligi ?, III, I, II, V, CO ning nomi?, Karbonat angdrid, Is gazi, Ohak, havo

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