Chapter 7 Crossword

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Across
  1. 1. A chemical reaction in which a single reactant breaks down into two or more products.
  2. 4. A process that rearranges the atoms in one or more substances into one or more new substances.
  3. 7. A substance that helps a reaction happen faster but is not used up in the reaction.
  4. 10. The mass of one mole of a substance.
  5. 13. A substance that enters into a chemical reaction.
  6. 14. A combination of chemical formulas and symbols that models a chemical reaction
  7. 15. The speed of a reaction
  8. 17. An exothermic chemical reaction in which a fuel reacts with oxygen.
  9. 19. A reaction in which the products can react together to re-form the original reactants.
  10. 21. A number placed in front of a chemical formula within a chemical equation that shows how many units of a reactant or product are needed to balance the chemical equation.
  11. 22. The state that occurs when forward and reverse reactions each happen at the same rate.
  12. 23. A chemical reaction in which two or more reactants combine into a single, more complex product.
Down
  1. 1. A chemical reaction in which two compounds swap cations or anions with each other; also known as a double-displacement reaction.
  2. 2. A substance that slows the rate of a reaction by reducing the effectiveness of catalysts.
  3. 3. A chemical reaction that releases more thermal energy than it absorbs.
  4. 5. The minimum energy needed for a chemical reaction to occur.
  5. 6. A chemical reaction in which one element in a compound is replaced by another element; also known as a single-displacement reaction.
  6. 8. The law that states that energy cannot be created or destroyed but only transferred between objects or transformed; also known as the first law of thermodynamics.
  7. 9. A chemical reaction that absorbs more thermal energy than it releases.
  8. 11. The principle that states that a chemical system in equilibrium will adjust its equilibrium position in such a way as to reduce the effect of any changes made to the system
  9. 12. The model that states that for a reaction to occur, the reactant particles must collide with each other, with the proper alignment, and with enough energy.
  10. 16. A substance that is formed during a chemical reaction.
  11. 18. SI fundamental unit for the quantity of matter in a substance; a count equal to 6.022 × 10^23.
  12. 19. A gain of electrons in a chemical reaction.
  13. 20. A loss of electrons in a chemical reaction