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Leta wants to know what chemical will form a precipitate with sodium chloride (NaCl). Leta chooses five different chemicals that she can safely mix with NaCl. She then places 40 mL of NaCl into 5 different beakers. Finally, Leta pours the different chemicals into the beakers containing NaCl. Leta observes what happens and records the results. What is the independent variable in Leta's experiment? A. the tool used to pour the chemicals into the beakers. B. the size of each beaker C. the amount of NaCl in each beaker D. the type of chemical added to the NaCI
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