vocab

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Across
  1. 3. reaction: A chemical reaction in which a compound breaks down into simpler substances. This is the opposite of a synthesis reaction.
  2. 7. reaction: A chemical reaction in which a substance combines rapidly with oxygen, often producing heat and light. Typically, this involves the reaction of a hydrocarbon with oxygen to produce carbon dioxide and water.
  3. 9. mass: The mass of one mole of a substance, typically expressed in grams per mole (g/mol).
  4. 10. equation: A symbolic representation of a chemical reaction, with reactants on the left side and products on the right side.
  5. 12. replacement reaction: A chemical reaction where ions exchange between two compounds to form two new compounds. This often involves the exchange of cations and anions.
  6. 15. reaction: A chemical reaction in which two or more substances combine to form a more complex product. Also known as a combination reaction.
  7. 16. formula: The simplest whole number ratio of atoms of each element in a compound.
  8. 18. composition: The percentage by mass of each element in a compound.
  9. 20. An insoluble solid formed in a chemical reaction when certain ions in solution combine to form a solid compound.
Down
  1. 1. A number placed in front of a chemical formula in a balanced equation to indicate the relative amounts of reactants and products.
  2. 2. A unit of measurement used in chemistry to express amounts of a chemical substance. One mole of any substance contains Avogadro's number of atoms, molecules, or formula units.
  3. 4. Substances present at the beginning of a chemical reaction that undergo chemical changes.
  4. 5. replacement reaction: A chemical reaction where an element replaces another element in a compound, typically involving a metal replacing the cation in a compound.
  5. 6. reaction: A process in which one or more substances (reactants) are transformed into one or more different substances (products) with new chemical and physical properties.
  6. 8. Substances formed as a result of a chemical reaction.
  7. 11. Number: The number of atoms, ions, or molecules in one mole of a substance, approximately
  8. 13. ratio: The ratio of the amounts of substances in a chemical reaction, based on the coefficients in a balanced chemical equation.
  9. 14. A compound that has water molecules loosely bound to its ions.
  10. 17. formula: A chemical formula that indicates the actual number of atoms of each element in a molecule.
  11. 19. of Conservation of Matter: The principle that matter cannot be created or destroyed in a chemical reaction, only rearranged.