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Sodium bicarbonate is the chemical name or baking powder. It’s chemical formula is NaHCO3. What does the subscript 3 mean

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egenriether
The subscript tells you how many atoms there are of the element it is to the right of. Here it means there are 3 oxygen atoms in the molecule.   If there is a group of atoms in parenthesis, it applies to each atom in that grouping.

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