MCAT Chem

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Author:
nextMD
ID:
191645
Filename:
MCAT Chem
Updated:
2013-01-07 19:25:28
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MCAT Chem Princeton Chapter
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MCAT Chem Units
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  1. Joule Units
    kg*m2/s2
  2. nano - n
    10-9
  3. micro -
    10-6
  4. milli - m
    10-3
  5. centi - c
    10-2
  6. kilo - k
    103
  7. mega - M
    106
  8. 1000L
    1m3
  9. 1L
    1000cm3
  10. 1mL
    1cm3 = 1cc (cubic centimeter)
  11. Density -
    • mass/volume
    • g/cm multiply by 1000  kg/m3
    • g/cm3  divide by 1000  kg/m3
  12. mole (Avogadro's number)
    6.02 x 1023
  13. number of moles
    mass in grams / molecular weight (MW)
  14. Rules for assigning Oxidation States
    • 1.  Ox state of any element in std state is zero.
    • 2. Sum of ox states of atoms in neutral molecule must always be zero, sum of ox states of atoms in an ion must equal the ion's charge.  
    • 3.  Group 1 metals have a +1 ox state, Group 2 metals have a +2 ox state
    • 4.  F has a -1 ox state
    • 5.  H has a +1 ox state when bonded to something more electronegative than carbon and a -1 ox state when bonded to an atom less electronegative than carbon, and a zero ox state when bonded to carbon
    • 6.  Oxygen has a -2 ox state
    • 7.  The rest of the halogens have a -1 ox state, and the atoms of the oxygen family have a -2 ox state
    • --> (A metal will never assume a negative ox state!)
  15. Ox state of element in standard state
    Zero
  16. Sum of oxidation states in neutral molecule
    Must equal zero
  17. Sum of oxidation states in an ion
    must equal the ion's charge
  18. Group 1 metals have what oxidation state?
    +1
  19. Group 2 metals have what oxidation state?
    +2
  20. Fluorine has what oxidation state?
    -1
  21. H has what oxidation sate when bonded to Carbon?
    zero
  22. H has what oxidation state when bonded to an atom less electronegative than carbon?
    -1
  23. H has what oxidation state when bonded to an atom more electronegative than carbon?
    +1
  24. Oxygen has what oxidation state?
    • -2
    • (except in peroxides, -1)
  25. Halogens have what oxidation state?
    -1
  26. Atoms in the oxygen family have what oxidation state?
    -2
  27. Electronegativities
    • FONClBrISCH
    • Fluorine
    • Oxygen
    • Nitrogen
    • Chlorine
    • Bromine
    • Iodine
    • Sulfur
    • Carbon
    • Hydrogen

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