Math of Chemistry

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Across
  1. 5. any time you have or need grams, you also need the ___
  2. 6. when ___, keep the answer to the fewest number of sig figs
  3. 7. percent composition uses the ___ of an element versus the GFM
  4. 8. gives the number of particles in one mole
  5. 10. the value 0.04520 has ___ significant figures
  6. 11. if ratios (such as 2:2) can be ___ then do so
  7. 12. if you have moles, ___ by the GFM to get grams
  8. 15. always "part over whole times 100"
  9. 16. the ___ formula shows the lowest ratio of atoms in a compound
  10. 18. when ___, keep the answer to the fewest number of decimal places
  11. 19. unit for measuring large amounts of small particles
Down
  1. 1. a zero is not significant if it is a ___
  2. 2. percent ___ by mass shows the mass contribution of an element
  3. 3. the ___ formula shows the exact proportion of atoms in a compound
  4. 4. amount of mass in a compund in atomic mass units (u)
  5. 5. amount of mass in a compund in grams per mole (g/mol)
  6. 9. Avogadro's number gives the number of ___ or particles in one mole
  7. 13. if you have grams, ___ by the GFM to get moles
  8. 14. reactions must be ___ before using a mole-mole ratio
  9. 17. the coefficients in a balanced reaction show the ___ of compounds