chemistry extra credit

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Across
  1. 1. the total pressure in a gas mixture is equal to the sum of partial pressures of the individual gases
  2. 6. the random movement of gas molecules from an area of higher concentration to an area of lower concentration
  3. 7. the pressure of an individual gas when in a mixture of gases
  4. 9. the measure of the average kinetic energy of the particles in a sample of matter
  5. 10. the minimum amount of energy that must be applied to a system to initiate a chemical change
  6. 15. the change in heat of the products from the reactants
  7. 17. The ability of a substance to combine with or change into one or more other substances
  8. 18. diffusion through a tiny opening
  9. 19. the amount of heat/energy to raise 1 gram of a substance by 1 degree celecius
  10. 20. the rate of effusion for a gas is inversely proportional to the square root of it's molar mass
Down
  1. 2. The pressure exerted on the surface of the earth by the weight of the gases in the earth's atmosphere
  2. 3. A characteristic that can be observed or measured without changing the sample's composition
  3. 4. biological catalysts that speeds up the rate of reaction in the body
  4. 5. increases as temperature increases
  5. 8. the study of how heat is converted to and from other forms of energy and how it affected matter
  6. 11. the volume of a gas is inversely proportional to the pressure if temperature is held constant
  7. 12. the total amount of energy; movement
  8. 13. a substance that speeds up a chemical reaction without itself undergoing any chemical change
  9. 14. standard temperature and pressure
  10. 16. the pressure of a given mass of gas is directly proportional with the Kelvin temperature when volume is held constant