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