chemistryChapter2

  1. base unit of time
    seconds
  2. base unit of temperature
    Kelvin
  3. base unit of amounts of substances
    mole
  4. base unit of electric current
    ampere
  5. base unit of luminous intensity
    candela
  6. density
    derived units; volume/mass
  7. cubic meter
    1m cublic centimeters; 100^3
  8. volume units
    length^3
  9. difference between mass and weight
    mass ignores gravity
  10. density of pure substances
    intensive property; doesn't depend on amount present
  11. calculating density
    mass/volume; keep units straight
  12. converting volume units
    use conversion factors; 1 meter=100 centimeters; 1 cubic meter=1,000,000 cm
  13. difference between theory and hypothesis
    theory is well tested; hypothesis is a testable statement
  14. difference between precision and accuracy
    accuracy is closeness to accepted; precision is closeness of experimental values
  15. significant figures
    all known digits plus one extra
  16. adding rule with sig figs
    answer is accurate to most specific place value in least specific number
  17. multiplying with sig figs
    number of sig figs in answer=number of sig figs in least specific number
  18. accuracy of a measurement
    closeness to accepted value
  19. percent error
    (accepted value-experimental value)/ accepted value
  20. inversely proportional
    product of two values remains constant
Author
dimeng
ID
313338
Card Set
chemistryChapter2
Description
chapter 2
Updated