Chem 1150

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Chem 1150
2012-01-27 10:24:00
Exam Chemistry

Flashcards from Exam 1 material
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  1. molecules are
    two or more atoms attached together
  2. Chemistry is the science that
    is the science that seeks to understand the behavior of matter by studying the behavior of atoms and molecules
  3. when similar observations are consistently made, it can lead to a
    Scientific Law
  4. Indefinite
    takes the shape of the container
  5. Fixed
    keeps shape when placed in a container
  6. crystalline solids
    solids have their particles arranged in an orderly geometric pattern

    salt and diamonds
  7. amorphous solids
    some solids have their particles randomly distributed without any long-range pattern.

    • plastic
    • glass
    • charcoal
  8. Distillation physical proterty
    boiling point
  9. filtration physical property
    state of matter (solid liquid gas)
  10. Chromatography physical property
  11. energy definition
    capacity to do work
  12. Celsius to Fahrenheit
    1.8 C= F-32
  13. inch to cm
    1 inch = 2.54 cm
  14. kg to lbs
    1 kg = 2.205 lbs
  15. extensive properties
    • the value depends on the quantity of
    • matter

    extensive properties cannot be used to identify what type of matter something is

    mass and volume
  16. intensive property
    • value independent of the quantity of
    • matter

  17. accuracy is
    an indication of how close a measurement comes to the actual value of the quantity
  18. precision
    is an indication of how reproducible a measurement is
  19. imprecision in measurements is caused by
    • random
    • errors
  20. inaccuracy in measurement caused
    by systematic errors
  21. systematic errors do not average out with repeated measurements because they consistently
    cause the measurement to be
    either too high or too low
  22. 1 in =cm
    2.54 cm
  23. 1 mile = ft
    = 5280 ft
  24. 1 mL = 1...
    1 cm3
  25. 1 kg = lb
    2.205 lb
  26. Remember micro, nano, pico powers
  27. 1 m3 = dm3
    1000 dm3
  28. 1 dm3 = cm3 = mL
    1000 cm3 = 1000 mL
  29. A chemical formula is comprised of
    of element symbols and numerical subscripts. Shows type andnumber of each atom present. (Molecular-Covalent Bonding)
  30. A molecular formula =
    • (subset of chemical formula) shows the actual
    • number of atoms of each element in a molecule of the compound.
    • The molecular formula for hydrogen peroxide is H2O2.
  31. An empirical formula
    • indicates relative number of atoms of each element in the compound. It is the simplest type of formula with WHOLE NUMBERS.
    • The empirical formula for hydrogen peroxide is HO.
  32. •A structural formula shows
    • the number of atoms and the bonds between them, that is, therelative placement and connections of atoms in the molecule.
    • The structural formula for hydrogen peroxide is H-O-O-H.
  33. 4567
    tetra, penta, hexa, hepta
  34. 8 9 10
    octa, nona, deca