Sure! Here are the definitions for the terms you provided:
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Subscript: A subscript describes how many atoms of an element are present in a molecule. For example, in H₂O, the "2" is a subscript indicating that there are two hydrogen atoms.
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Product: A product is the end result of a chemical reaction. It refers to the substances formed after the reactants undergo a chemical change.
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Coefficient: A coefficient describes how many molecules take part in a reaction. It is placed in front of the chemical formula to indicate the number of molecules involved. For instance, in the reaction 2H₂ + O₂ → 2H₂O, the "2" in front of H₂O indicates that two molecules of water are produced.
If you have any other terms or need further clarification, feel free to ask!