1.
A) rust B) water C) oxygen D) iron 2.
A) A balanced chemical equation B) A rate C) Speed D) Age 3.
A) physical change B) nuclear reaction C) chemical change D) chemical fusion 4.
A) atomic number B) chemical formula C) concentration D) activation energy 5.
A) catalyst B) endotherm C) inhibitor D) enzymes 6.
A) inhibitor B) catalyst C) exotherm D) endotherm 7.
A) products B) resultants C) reactants D) coefficients 8.
A) reactants B) products C) numbers in front of the chemical formulas D) precipitates 9.
A) The bonds of the products have more energy than those of the reactants. B) The energy released is always in the form of heat. C) The products are more stable. D) The products are less stable. 10.
A) slow down B) continue at the same rate C) stop D) speed up 11.
A) matter can be created and destroyed but does not change forms B) in a chemical reaction, matter is not created or destroyed, but is conserved C) in a chemical reaction, the final mass of the products is always greater than the starting mass of the reactants D) in a chemical reaction, efforts should be made to preserve rare elements without changing them 12.
A) what type of chemical bond it forms B) how stable the compound is C) how electrons are arranged D) what elements it contains 13.
A) The word energy is written as a reactant. B) A Greek letter, gamma, is drawn over the arrow. C) The word energy is written as a product. D) A letter E appears in boldface type over the arrow. 14.
A) is less than the mass of the reactants B) always equals the mass of the reactants C) cannot be predicted based on the mass of the reactants D) is twice as great as the mass of the reactants 15.
A) A physical law B) Synthesis C) The law of conservation of matter D) A chemical equation 16.
A) energy requirement B) energy of catalyzation C) energy of inhibition D) activation energy 17.
A) hydrogen and oxygen B) hydrogen peroxide C) hydrogen oxide D) oxygen and water 18.
A) Exothermic B) Inhibited C) Catalyzed D) Endothermic 19.
A) Exothermic B) Inhibited C) Endothermic D) Catalyzed 20.
A) The bonds of the reactants have more energy than those of the products. B) The energy supplied is always in the form of electricity. C) The reactants are less stable. D) The reactants are more stable.
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