Chemistry, 19.07.2019 01:30 21hendlill
Astudent hypothesizes that water from infrequently used school faucets contains more chemical impurities than the water from frequently used faucets. at the same time of day, the student uses a water test kit to measure the water impurities from the different faucets. which is the manipulated variable in this investigation?
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Astudent hypothesizes that water from infrequently used school faucets contains more chemical impuri...
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