Chemistry Quiz 1

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servinggod247
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168002
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Chemistry Quiz 1
Updated:
2012-08-29 22:44:19
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chemistry
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chemistry
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  1. Scientific method
    • 1. Observations (including measurements
    • 2. Hypothesis ( allows one to make predictions which leads to tests or experiments on the hypothesis)
    • 3. Experiments
    • 4. Theory
    •        
  2. Hypothesis may be changed if...
    experiments do not support it
  3. Theory may be modified if....
    additional experimetns do not support it
  4. Hypotheses explains...
    A small series of data, gone through little testing, and one has little confidence in it
  5. Theory explains
    A large series of data, gone through much extensive testing, and one has great confidence in it
  6. Scientific law is 
    something you cant break
  7. A scientific law is _________ and a theory can be used to ______
    what happens

    explain a law
  8. Energy is ________
    the ability to do work
  9. Two types of Energy
    • Kenetic
    • Potential
  10. Kenetic energy is
    the energy of motion
  11. Potential Energy is
    stored energy (position or composition)
  12. Food has stored energy in the form of ________
    composition
  13. Composition refers to the ________ makeup
    chemical
  14. How is energy measured?
    by converting it to hear them by measuring the heat
  15. Heat is measured by the 
    Calorie and Joule
  16. 1 gram H2O + 1 calorie 
    temperature rises by 1 degree C
  17. Kilocalorie is equal to _______ calories
    1000
  18. How many Joules = 1 calorie?
    4.189
  19. Kilojoule is equal to 
    1000 Joules
  20. Temperature is the _______ of heat
    measurement
  21. Freezing point in Celsius
    0 degrees C
  22. Freezing point Fahrenheit
    32 degrees F
  23. freezing point Kelvin
    273 degrees K
  24. Normal body temp Celsius
    37 degrees C
  25. Normal body temp Fahrenheit
    98.6 degrees F
  26. Normal body temp Kelvin
    310 degrees K
  27. Boiling point Celsius
    100 degrees C
  28. Boiling point Fahrenheit
    212 degrees F
  29. Boiling point Kelvin
    373 degrees K
  30. Celcius to kelvin
    K= C + 273
  31. Celcius to Fahrenheit
    1.8C + 32
  32. What is specific heat?
    The ability to store heat 
  33. Specific Heat = 
    Number of Calories or joules needed to raise 1g by 1 degree C
  34. What is Matter?
    anything that has mass and occupies space
  35. pure substance
    matter that has a fixed or constant composition
  36. what is a mixture?
    two or more substances are physically mixed, but not chemically combined 
  37. what is an element?
    the simplest type of a pure substance, composed of only one kind of material
  38. What is a compound?
    pure substance, but consists of 2 or more elements chemically combined in the same proportion
  39. Mixers do not have to be.....
    even proportions, compounds do
  40. Heterogeneous mixture
    the components do not have a uniform composition ( pennies in water)
  41. Homogeneous mixture (solution)
    the composition is uniform throughout the sample (salt water, a solution of salt and water)
  42. What is a property?
    trait or characteristic of a substance
  43. A physical property....
    can be measured or observed without changing composition
  44. A chemical property...
    is only observable or measurable when the substance unergoes a change in composition
  45. A state (solid liquid or gas) is a
    physical property
  46. 3 important parts of a measurement
    • number
    • unit
    • uncertainty
  47. 1 inch = _____ cm
    2.54 cm
  48. how many pounds in 1 kg?
    2.205
  49. how many gt in a liter?
    1.06
  50. how many g in a lb?
    454 g

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