Question

1. the process in which a set of substances are changed at the molecular level in order to become a different substance is: a. a reactant b. a chemical reaction c. a reagent d. a product 2. a substance that is consumed during a chemical reaction is called: a. a reactant b. a chemical reaction c. a reagent d. a product 3. a substance that participates in a chemical reaction, but which is not consumed by it is called: a. a reactant b. an inhibitor c. a reagent d. a product 4. the substance produced by a chemical reaction is called: a. a catalyst b. an inhibitor c. a reagent d. a product 5. __ speeds up a chemical reaction, and __ closes it down. a. a catalyst...an inhibitor b. a reactant...a reagent c. an inhibitor...a catalyst d. a reactant...a product

Explanation:

1. A chemical reaction is the process where substances change at the molecular level to form different substances.
2. Reactants are substances consumed in a chemical reaction.
3. A catalyst participates in a reaction but is not consumed; an inhibitor slows or stops a reaction.
4. Products are the substances produced by a chemical reaction.
5. Catalysts speed up reactions and inhibitors slow or stop them.

Answer:

1. B. a chemical reaction
2. A. a reactant
3. None of the above (should be a catalyst); if choosing the closest, no perfect option as given.
4. D. a product
5. A. A catalyst...an inhibitor