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Chemistry, 09.09.2019 22:30 gingerham1
Ethan is observing chemical and physical properties of a substance. he heats a substance and observes that the substance turns from a brown solid to a black powder. he refers to several chemistry journals that claim this represents a chemical reaction. from his observation and research, he concludes that the substance goes through a chemical change when heated. how can ethan best defend his conclusion?
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Ethan is observing chemical and physical properties of a substance. he heats a substance and observe...
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