Which these is not a sign of a chemical reaction?

The substance that is formed in a chemical reaction is called the

Which of the following stores chemical energy?

Which of the following occurs in an endothermic reaction but not in an exothermic reaction?

A type of endothermic reaction is

A type of reaction that produces an increase in temperature is

A reaction in which the products contain more chemical energy than the reactants is

Which of these represents the release of chemical energy?

Which of the following are products and reactants of a chemical reaction most likely to have in common?

Which of the following occurs when gasoline is burned?

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