Sodium bicarbonate is the chemical name for baking powder. Its chemical formula is NaHCO3. What does the subscript 3 mean? A.
There are three molecules of sodium bicarbonate.
B.
There are three molecules of oxygen in sodium bicarbonate.
C.
There are three atoms of oxygen in sodium bicarbonate.
D.
There are three atoms of sodium bicarbonate.

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the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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