Chem chapter 1

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Author:
melissag94
ID:
258710
Filename:
Chem chapter 1
Updated:
2014-02-03 12:48:15
Tags:
chem107
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Description:
first chapter
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  1. molecules stop moving at?
    absolute zero
  2. 3 classifications of matter?
    • solid
    • liquid
    • gas
  3. substances that cannot be broken down into simpler substances by chemical reactions are called
    elements
  4. substances that can be decomposed are called
    compounds
  5. compounds are composed of molecules that?
    contain two or more different kinds of atoms
  6. elements are the?
    • basic building blocks of matter
    • composed of single type of atom
  7. elements ___ be broken down, compounds ___
    • cant
    • can be
  8. pure substance?
    made of one type of atom
  9. ___ are made up of different types of particles.
    mixtures
  10. uniform throughout?
    homogeneous mixture
  11. not uniform throughout?
    heterogeneous mixture
  12. example of homogeneous mixture?
    • blue coolaid
    • tea w/dissolved sugar
  13. example of heterogeneous mixture?
    salt at bottom of water
  14. a characteristic that can be measured without changing the identity of the substance
    physical property
  15. example of physical property?
    • melting point
    • boiling point
    • color
  16. indicates how a substance reacts with something else
    chemical property
  17. examples of chemical property?
    • iron rusts
    • gasoline burns in air
    • nitric acid reacts with sodium hydroxide
  18. a physical property give _____ while a chemical property ___
    • info about it, not what it does
    • tells you how it reacts
  19. in a ______ _____, the original substance still exists, but it has changed in form
    physical change
  20. example of physical change
    • boiling water
    • tearing paper
    • propane evaporates
  21. in a ____ ___, a new substance is produced
    chemical change
  22. examples of chemical change
    • sodium metal reacts with water
    • butane combusts in air
  23. ice melting is a?
    physical change
  24. cooking, heating, burning are all?
    chemical changes
  25. described by words
    qualitative
  26. characterized by numbers
    quantitative
  27. refers to how close a measurement comes to a true or accepted value
    accuracy
  28. refers to how close multiple measurement of the same quantity come to each other
    precision
  29. digit of uncertainty is ?
    the last number
  30. in multiplication/division the number of sig figs are determined by?
    the number with the lowest # of sig figs
  31. formula to convert Celsius to kelvin
    K= C + 273
  32. mass is to ?
    gram
  33. volume is to ?
    liter
  34. length is to ?
    liter
  35. time is to ?
    second
  36. milli?
    1000
  37. centi?
    100
  38. deci?
    10
  39. kilo
    1 kilo - _____ = 1000
  40. mega
    1 mega = 106
  41. 12 in =
    1ft
  42. 1 yard=
    3 ft
  43. 1 gallon =
    4 qts
  44. 16 ounces =
    1 lb
  45. density formula?
    d=m/v
  46. 1L=
    1000cm3
  47. 1mL=
    1cm3

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