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A polyatomic ion comprises a group of atoms that carry an overall charge

Chemistry

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A polyatomic ion comprises a group of atoms that carry an overall charge. There is no easy way to learn the names of polyatomic ions. Memorizing the most common ones is important. Formula Name NH4+ ammonium nitrate sulfate NO3 SO42- CO32- PO43- carbonate phosphate chlorate
Part A What is the name of the ionic compound BaCO3 ? Enter the compound name
Part B What is the molecular formula for ammonium nitrate? Express your answer as a chemical formula.