Fundamentals of Chemistry

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Across
  1. 2. The weighted average of the atomic masses of an element's naturally occurring isotopes.
  2. 3. A pure substance formed when two or more distinct elements combine chemically in a fixed ratio by mass.
  3. 5. Equal volumes of all gases under identical conditions of temperature and pressure contain an equal number of molecules.
  4. 6. The closeness of multiple measurements of the same quantity to one another.
  5. 10. A mixture whose components are completely uniform throughout, with no visible boundaries of separation.
  6. 11. A pure chemical substance consisting of only one type of atom that cannot be decomposed into simpler substances by ordinary chemical methods.
  7. 16. Matter can neither be created nor destroyed in a chemical reaction.
  8. 17. The agreement of a particular value to the true, accepted value of the quantity.
  9. 18. The numerical coefficients placed before chemical formulae in a balanced equation representing mole ratios of participants.
  10. 25. A given chemical compound always contains exactly the same proportion of elements by mass, regardless of its source or method of preparation.
  11. 26. The sum of the atomic masses of all the atoms present in a covalent molecule.
  12. 27. A mixture with non-uniform composition and distinct phases separated by visible boundaries.
  13. 28. The sum of atomic masses of all atoms present in a formula unit of an ionic compound.
Down
  1. 1. When gases combine or are produced in a chemical reaction, they do so in a simple ratio by volume, provided all gases are measured at identical temperature and pressure.
  2. 4. The reactant that remains unreacted after the limiting reagent has been entirely consumed.
  3. 7. If two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element are in a ratio of small whole numbers.
  4. 8. The number of moles of solute dissolved in one litre of solution.
  5. 9. The SI base unit for the amount of substance..
  6. 12. The number of moles of solute dissolved per kilogram of solvent.
  7. 13. The dimensionless ratio of the number of moles of a specific component to the total number of moles of all components present in the mixture.
  8. 14. Mass The mass of one mole of a substance expressed in grams per mole.
  9. 15. The volume occupied by one mole of an ideal gas at Standard Temperature and Pressure.
  10. 19. The reactant that is completely consumed first in a reaction, thereby capping and determining the theoretical yield of products.
  11. 20. Anything that possesses mass and occupies space.
  12. 21. Exactly 1/12th of the mass of one carbon-12 atom.
  13. 22. The quantitative relationship between the amounts of reactants consumed and products formed in a balanced chemical equation.
  14. 23. The defined numerical value 6.022 X 10^{23}.
  15. 24. Meaningful digits in a measured or calculated quantity known with certainty, plus one final digit that is estimated or uncertain.