Which of the following are evidence that a chemical reaction has occurred?
A. Two liquids are combined and a gas is released
B. A substance is added to water and dissolves
C. Two liquids are combined and a solid precipitate forms
D. A new substance is formed
E. A single reactant changes from a liquid to a solid
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The first element on the periodic table of elements is carbon. a. true b. false
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If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form
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Which of the following are evidence that a chemical reaction has occurred?
A. Two liquids are combi...
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