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Calcium Bicarbonate is Ca(HCO3)2, so yes there is an oxygen molecule in calcium bicarbonate.
No,, it is actually calcium sulfate.
Calcium bicarbonate is not stable as a solid.
The Chemical Formula for Calcium bicarbonate is Ca(HCO3)2.
The chemical formula (not symbol) of calcium bicarbonate is Ca(HCO3)2.
Sodium bicarbonate is NaHCO3, Calcium carbonate is CaCO3.