Chemistry 4th nine-weeks bonus

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Across
  1. 6. What is the minimal amount of energy that must be applied to a system to initiate a chemical change
  2. 9. What is a substance that accepts a proton?
  3. 10. A substance that speeds up a chemical reaction, without undergoing any chemical change itself, is called
  4. 14. A substance that that can act as either a base or acid
  5. 15. Reactions that require larger amounts of activation energy are called
  6. 17. The transaction of a substance directly from gas to solid
  7. 18. What is the device used to measure the energy absorbed or released as heat in a chemical reaction?
  8. 19. Reaction where several reactants make a single product
  9. 20. What is the transition of substance directly from solid to gas called
Down
  1. 1. What is the point on a phase diagram in which two phases of a substance become indistinguishable from one another?
  2. 2. What process can be used to find the concentration of a solution by comparing it to a solution of known concentration
  3. 3. What is the measure of the average kinetic energy of the particles in a sample of matter?
  4. 4. Reactions that release heat
  5. 5. What is the change in heat of the products from the reactants called?
  6. 7. Reaction where one element trades places with another element.
  7. 8. Reaction where both elements in a reactant trade places
  8. 11. A substance that increases the concentration of hydrogen ions in an aqueous solution.
  9. 12. Law that states a direct relation between volume and temperature of a gas
  10. 13. Reaction where one reactant forms multiple products
  11. 16. - What is the total amount of energy called?