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Chemistry Review

Learn about the clues indicating a chemical reaction, the significance of precipitate formation, energy changes, catalysts' role, and atom counts in compounds.

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Chemistry Review

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  1. Chemistry Review

  2. Formation of a precipitate is a clue that a ________ has happened.

  3. Chemical Reaction

  4. Energy cannot be _______or destroyed,

  5. Created

  6. A change in _______ is a clue that a chemical reaction has happened.

  7. Color

  8. How many elements are in the following substance? COMg

  9. 3 capital letters in a row mean a new substance

  10. What is needed to brake chemical bonds?

  11. Energy

  12. What kind of reaction is more energy released than absorbed?

  13. Exothermic

  14. _______ help make chemical reactions change faster.

  15. Catalysts

  16. Adding heat can ______ reaction rates in most reactions.

  17. Increase

  18. In a chemical equation, what comes before and after the arrow?

  19. Reactants + Reactants -> Products

  20. How many of each atom is in the following substance? H2O(C3H)2

  21. H = 4 O = 1 C = 6

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