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Chemistry, 04.12.2019 01:31 jesussanchez1445
In a chemical reaction, if a color change is detected, if an odor change is detected, or if a precipitate is formed, then:
a chemical reaction has definitely occurred
only physical reactions have occurred
a chemical reaction may have occurred
both physical and chemical reactions have definitely occurred
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In a chemical reaction, if a color change is detected, if an odor change is detected, or if a precip...
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