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Avariable that is not being directly tested during an experiment should be
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The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride
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What does a numerical subscript following an element in a chemical formula mean?
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